/* =====================================================================
   YotoChem / 优投化学 — Global Stylesheet
   Modern, professional, international chemical enterprise website
   Palette inspired by BASF / Covestro / Clariant aesthetics
   ===================================================================== */

/* ---------- Design Tokens ---------- */
:root {
    /* Brand colors */
    --color-ink:       #0B2545;   /* deep navy — trust, chemistry */
    --color-ink-2:     #13315C;
    --color-brand:     #0E7C86;   /* teal — waterborne / eco */
    --color-brand-2:   #14B8C4;
    --color-brand-dark:#0A626B;
    --color-accent:    #C9A227;   /* refined gold for subtle highlights */

    /* Neutrals */
    --color-bg:        #FFFFFF;
    --color-bg-alt:    #F4F7FA;
    --color-bg-deep:   #0B2545;
    --color-line:      #E3E9EF;
    --color-text:      #1B2A3A;
    --color-muted:     #5A6B7B;
    --color-white:     #FFFFFF;

    /* Typography */
    --font-sans: "Inter", "Helvetica Neue", "PingFang SC", "Hiragino Sans GB",
                 "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
    --font-display: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;

    /* Spacing & radius */
    --radius-sm: 6px;
    --radius:    12px;
    --radius-lg: 20px;
    --container: 1240px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(11,37,69,.06), 0 1px 3px rgba(11,37,69,.04);
    --shadow:    0 6px 24px rgba(11,37,69,.08);
    --shadow-lg: 0 24px 60px rgba(11,37,69,.14);

    --transition: .28s cubic-bezier(.4,.0,.2,1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-brand); }
ul { margin: 0; padding: 0; list-style: none; }
h1,h2,h3,h4 { font-family: var(--font-display); font-weight: 700; line-height: 1.2; color: var(--color-ink); margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(2.1rem, 4.5vw, 3.4rem); }
h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); }
h3 { font-size: 1.25rem; }
p  { margin: 0 0 1rem; }

/* ---------- Layout helpers ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 64px 0; }
.section--tight { padding: 44px 0; }
.section--alt { background: var(--color-bg-alt); }
.section--dark { background: var(--color-ink); color: #D7E0EA; }
.section--dark h1, .section--dark h2, .section--dark h3 { color: #fff; }

.grid { display: grid; gap: 28px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.section-head { max-width: 720px; margin: 0 auto 36px; text-align: center; }
.section-head .eyebrow,
.eyebrow {
    display: inline-block;
    font-size: 0.875rem; font-weight: 700; letter-spacing: .14em;
    text-transform: uppercase; color: var(--color-brand);
    margin-bottom: 14px;
}
.section-head p { color: var(--color-muted); font-size: 1.05rem; margin: 0; }
.section-head.left p { margin-top: 10px; }
.section-head.left { margin-left: 0; margin-bottom: 22px; text-align: left; }
.section-head--row {
    display: flex; justify-content: space-between; align-items: flex-end;
    max-width: none; text-align: left; gap: 16px;
}
.section-head--row h2 { margin-bottom: 0; }

/* Product filter bar */
.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-bottom: 40px; }
.filter-bar button,
.filter-bar a {
    padding: 10px 20px; border-radius: 999px; border: 1px solid var(--color-line);
    background: #fff; cursor: pointer; font-weight: 600; font-size: .88rem;
    color: var(--color-ink); transition: var(--transition);
    text-decoration: none; display: inline-block;
}
.filter-bar button:hover,
.filter-bar a:hover { border-color: var(--color-brand); color: var(--color-brand); }
.filter-bar button.active,
.filter-bar a.active { background: rgb(14 124 134); color: #fff; border-color: rgb(14 124 134); }
.filter-bar--apps { margin-top: -24px; margin-bottom: 32px; }
.filter-bar--apps a { font-size: 0.8125rem; padding: 8px 14px; }
.product-app-groups { display: flex; flex-direction: column; gap: 56px; }
.product-app-groups__hint { color: var(--color-muted); text-align: center; margin: 0 0 8px; font-size: 0.9375rem; }
.product-app-section__head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 24px; flex-wrap: wrap; }
.product-app-section__head h2 { margin: 6px 0 4px; font-size: clamp(1.35rem, 2vw, 1.75rem); }
.product-app-section__head p { margin: 0; color: var(--color-muted); font-size: 0.9375rem; }
.product-app-section__more { margin: 20px 0 0; text-align: center; }
.product-card__apps { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.product-card__app-tag { display: inline-block; font-size: 0.6875rem; font-weight: 600; letter-spacing: 0.02em; text-transform: uppercase; color: rgb(14 124 134); background: rgba(14, 124, 134, 0.08); border: 1px solid rgba(14, 124, 134, 0.18); border-radius: 999px; padding: 3px 8px; }

/* ---------- Product search ---------- */
.product-search-band {
    margin-top: 20px;
    padding: 36px 0 28px;
    position: relative;
    z-index: 3;
}
.product-search-band.section--tight {
    padding: 36px 0 28px;
}
.product-search-band + .section--tight {
    padding-top: 32px;
}
.product-search-wrap { margin-bottom: 28px; }
.product-search { position: relative; width: 100%; max-width: 720px; margin: 0 auto; }
.product-search--filter { max-width: none; margin: 0; }
.product-search__hint {
    margin: 0 0 8px;
    text-align: center;
    font-size: .82rem;
    color: var(--color-muted);
    letter-spacing: .04em;
}
.product-search--filter .product-search__hint { text-align: left; }
.product-search__field {
    display: flex;
    align-items: center;
    gap: 12px;
    background: #fff;
    border: 1px solid var(--color-line);
    border-radius: 999px;
    padding: 6px 8px 6px 18px;
    box-shadow: var(--shadow);
    transition: border-color var(--transition), box-shadow var(--transition);
}
.product-search--filter .product-search__field { border-radius: var(--radius-lg); }
.product-search__field:focus-within {
    border-color: var(--color-brand);
    box-shadow: 0 0 0 3px rgba(14,124,134,.12);
}
.product-search__icon { width: 20px; height: 20px; flex: none; color: var(--color-brand); }
.product-search__input {
    flex: 1;
    min-width: 0;
    border: 0;
    background: transparent;
    font: inherit;
    font-size: .96rem;
    color: var(--color-text);
    padding: 10px 0;
}
.product-search__input:focus { outline: none; }
.product-search__input::-webkit-search-cancel-button { display: none; }
.product-search__clear {
    width: 34px;
    height: 34px;
    border: 0;
    border-radius: 50%;
    background: var(--color-bg-alt);
    color: var(--color-muted);
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    flex: none;
    transition: background var(--transition), color var(--transition);
}
.product-search__clear:hover { background: var(--color-brand); color: #fff; }
.product-search__results {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    background: #fff;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-height: 380px;
    overflow-y: auto;
    z-index: 30;
}
.product-search__result {
    display: block;
    padding: 14px 18px;
    border-bottom: 1px solid var(--color-line);
    color: inherit;
    transition: background var(--transition);
}
.product-search__result:last-child { border-bottom: 0; }
.product-search__result:hover { background: var(--color-bg-alt); color: inherit; }
.product-search__result strong {
    display: block;
    font-size: .98rem;
    color: var(--color-ink);
    margin-bottom: 2px;
}
.product-search__result span {
    display: block;
    font-size: .88rem;
    color: var(--color-brand);
    margin-bottom: 4px;
}
.product-search__result small {
    display: block;
    font-size: .84rem;
    color: var(--color-muted);
    line-height: 1.45;
}
.product-search__empty,
.product-search__status {
    margin: 0;
    padding: 12px 2px 0;
    font-size: .9rem;
    color: var(--color-muted);
    text-align: center;
}
.product-search--filter .product-search__status { text-align: left; }
.product-search__results .product-search__empty { padding: 18px; text-align: center; }

/* Horizontal scroll wrapper */
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.table-scroll .spec-table { min-width: 520px; }
.table-scroll .spec-table--kv { min-width: 0; }
.anchor-pad { scroll-margin-top: 100px; }
.product-card[id] { scroll-margin-top: 100px; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 14px 28px; border-radius: 999px;
    font-weight: 600; font-size: .95rem; letter-spacing: .01em;
    cursor: pointer; border: 1.5px solid transparent;
    transition: all var(--transition);
    white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; }
.btn--primary { background: var(--color-brand); color: #fff; }
.btn--primary:hover { background: var(--color-brand-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow); }
.btn--ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.5); }
.btn--ghost:hover { background: #fff; color: var(--color-ink); border-color: #fff; }
.btn--outline { background: transparent; color: var(--color-ink); border-color: var(--color-line); }
.btn--outline:hover { border-color: var(--color-brand); color: var(--color-brand); }
.btn--white { background: #fff; color: var(--color-ink); }
.btn--white:hover { background: var(--color-bg-alt); transform: translateY(-2px); }
.btn--lg { padding: 16px 34px; font-size: 1rem; }
.text-link { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; color: var(--color-brand); }
.text-link svg { width: 14px; height: 14px; flex-shrink: 0; }
.text-link:hover { gap: 10px; }

/* ---------- Top bar ---------- */
.topbar {
    background: var(--color-ink);
    color: #B9C7D6;
    font-size: .82rem;
}
.topbar .container { display: flex; align-items: center; justify-content: space-between; height: 40px; }
.topbar a { color: #B9C7D6; }
.topbar a:hover { color: #fff; }
.topbar__info { display: flex; gap: 22px; align-items: center; }
.topbar__info span { display: inline-flex; align-items: center; gap: 6px; }
.topbar__info svg { width: 14px; height: 14px; opacity: .8; }
.topbar__tools { display: flex; gap: 18px; align-items: center; }

/* Language dropdown */
.lang-switcher { position: relative; z-index: 120; }
.lang-switcher__toggle {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 999px;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.06); color: #E8EEF4;
  font-size: .78rem; font-weight: 600; line-height: 1.2;
  cursor: pointer; transition: background .2s, border-color .2s;
}
.lang-switcher__toggle:hover { background: rgba(255,255,255,.12); border-color: rgba(255,255,255,.28); }
.lang-switcher__flag { font-size: 1rem; line-height: 1; }
.lang-switcher__current { max-width: 7.5rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lang-switcher__caret { width: 14px; height: 14px; opacity: .75; transition: transform .2s; }
.lang-switcher.is-open .lang-switcher__caret { transform: rotate(180deg); }
.lang-switcher__menu {
  position: absolute; right: 0; top: calc(100% + 6px);
  min-width: 168px; margin: 0; padding: 6px; list-style: none;
  background: #fff; border: 1px solid var(--color-border, #DDE4EC);
  border-radius: 10px; box-shadow: 0 12px 32px rgba(15,35,55,.16);
  opacity: 0; visibility: hidden; transform: translateY(-6px);
  transition: opacity .18s, transform .18s, visibility .18s;
}
.lang-switcher.is-open .lang-switcher__menu { opacity: 1; visibility: visible; transform: translateY(0); }
.lang-switcher__menu a {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px; border-radius: 7px;
  color: var(--color-ink, #1A2B3C); font-size: .82rem; font-weight: 600;
}
.lang-switcher__menu a:hover { background: var(--color-surface-alt, #F4F7FA); color: var(--color-brand); }
.lang-switcher__menu a.active { background: rgba(14,124,134,.1); color: var(--color-brand); }
.topbar .lang-switcher__menu a { color: var(--color-ink, #1A2B3C); }
.topbar .lang-switcher__menu a:hover { color: var(--color-brand); }

/* legacy inline lang links (fallback) */
.topbar__tools .lang { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 0 .15rem; max-width: min(100%, 520px); line-height: 1.35; font-size: .78rem; }
.topbar__tools .lang a { font-weight: 600; white-space: nowrap; }
.topbar__tools .lang .active { color: var(--color-brand-2); }

/* ---------- Language suggestion banner ---------- */
.lang-banner {
    background: linear-gradient(90deg, #0B2545 0%, #0E3A5C 100%);
    color: #D8E4EF;
    font-size: .84rem;
    border-bottom: 1px solid rgba(14, 124, 134, .35);
}
.lang-banner__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    min-height: 44px;
    padding: 8px 0;
}
.lang-banner__text { margin: 0; line-height: 1.45; }
.lang-banner__actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}
.lang-banner__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px 14px;
    border-radius: 999px;
    font-size: .8rem;
    font-weight: 600;
    line-height: 1.2;
    border: 1px solid transparent;
    cursor: pointer;
    white-space: nowrap;
    transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.lang-banner__btn--primary {
    background: var(--color-brand);
    color: #fff;
    border-color: var(--color-brand);
}
.lang-banner__btn--primary:hover { background: var(--color-brand-dark); color: #fff; border-color: var(--color-brand-dark); }
.lang-banner__btn--ghost {
    background: transparent;
    color: #D8E4EF;
    border-color: rgba(255, 255, 255, .35);
}
.lang-banner__btn--ghost:hover { background: rgba(255, 255, 255, .1); color: #fff; }
.lang-banner__close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    margin-left: 2px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: transparent;
    color: #9FB1C4;
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
}
.lang-banner__close:hover { background: rgba(255, 255, 255, .1); color: #fff; }

/* ---------- Cookie consent (GDPR) ---------- */
.cookie-banner {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9990;
    background: #fff;
    border-top: 1px solid var(--color-line);
    box-shadow: 0 -8px 32px rgba(11, 37, 69, .12);
    font-size: .86rem;
    color: var(--color-text);
}
.cookie-banner__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 14px 0;
}
.cookie-banner__text {
    margin: 0;
    line-height: 1.5;
    color: var(--color-muted);
    flex: 1;
    min-width: 0;
}
.cookie-banner__text a {
    color: var(--color-brand);
    text-decoration: underline;
    text-underline-offset: 2px;
}
.cookie-banner__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    flex-shrink: 0;
}
.cookie-banner__btn {
    font: inherit;
    font-size: .8rem;
    font-weight: 600;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    white-space: nowrap;
    transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.cookie-banner__btn--primary {
    background: var(--color-brand);
    color: #fff;
    border-color: var(--color-brand);
}
.cookie-banner__btn--primary:hover { background: var(--color-brand-dark); border-color: var(--color-brand-dark); }
.cookie-banner__btn--ghost {
    background: transparent;
    color: var(--color-ink);
    border-color: var(--color-line);
}
.cookie-banner__btn--ghost:hover { border-color: var(--color-brand); color: var(--color-brand); }

.cookie-modal {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}
.cookie-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(11, 37, 69, .45);
}
.cookie-modal__panel {
    position: relative;
    width: 100%;
    max-width: 520px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}
.cookie-modal__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 20px 24px 12px;
    border-bottom: 1px solid var(--color-line);
}
.cookie-modal__head h2 { margin: 0; font-size: 1.15rem; }
.cookie-modal__close {
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    color: var(--color-muted);
    border-radius: var(--radius-sm);
}
.cookie-modal__close:hover { background: var(--color-bg-alt); color: var(--color-ink); }
.cookie-modal__body { padding: 16px 24px; }
.cookie-option {
    padding: 14px 0;
    border-bottom: 1px solid var(--color-line);
}
.cookie-option:last-child { border-bottom: none; }
.cookie-option__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 6px;
}
.cookie-option p { margin: 0; font-size: .84rem; color: var(--color-muted); line-height: 1.5; }
.cookie-option__badge {
    font-size: .72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--color-brand);
    background: rgba(14, 124, 134, .1);
    padding: 3px 8px;
    border-radius: 999px;
}
.cookie-toggle {
    position: relative;
    display: inline-flex;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
}
.cookie-toggle input {
    opacity: 0;
    width: 0;
    height: 0;
    position: absolute;
}
.cookie-toggle span {
    position: absolute;
    inset: 0;
    background: #CBD5E1;
    border-radius: 999px;
    cursor: pointer;
    transition: background var(--transition);
}
.cookie-toggle span::after {
    content: "";
    position: absolute;
    width: 18px;
    height: 18px;
    left: 3px;
    top: 3px;
    background: #fff;
    border-radius: 50%;
    transition: transform var(--transition);
    box-shadow: var(--shadow-sm);
}
.cookie-toggle input:checked + span { background: var(--color-brand); }
.cookie-toggle input:checked + span::after { transform: translateX(20px); }
.cookie-modal__foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 16px 24px 20px;
    border-top: 1px solid var(--color-line);
    background: var(--color-bg-alt);
}
.cookie-modal__privacy {
    font-size: .84rem;
    color: var(--color-brand);
    text-decoration: underline;
    text-underline-offset: 2px;
}
.cookie-modal__save { flex-shrink: 0; }
body.has-cookie-banner .to-top { bottom: calc(72px + env(safe-area-inset-bottom, 0px)); }

[dir="rtl"] .cookie-banner__inner { flex-direction: row-reverse; }
[dir="rtl"] .cookie-banner__actions { flex-direction: row-reverse; }
[dir="rtl"] .cookie-toggle input:checked + span::after { transform: translateX(-20px); }

/* ---------- Header / Nav ---------- */
.header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255,255,255,.92);
    backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--color-line);
    transition: box-shadow var(--transition);
}
.header.scrolled { box-shadow: var(--shadow-sm); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand__logo { width: 42px; height: 42px; flex: none; }
.brand__name { display: flex; flex-direction: column; line-height: 1.05; }
.brand__name b { font-size: 1.18rem; font-weight: 800; color: var(--color-ink); letter-spacing: -.01em; }
.brand__name small { font-size: .68rem; color: var(--color-muted); letter-spacing: .12em; text-transform: uppercase; }
.menu { display: flex; align-items: center; gap: 4px; }
.menu > li > a {
    display: flex; align-items: center; gap: 5px;
    padding: 10px 16px; border-radius: var(--radius-sm);
    font-weight: 600; font-size: .95rem; color: var(--color-ink);
}
.menu > li > a:hover, .menu > li:hover > a { color: var(--color-brand); background: var(--color-bg-alt); }
.menu .caret { width: 12px; height: 12px; opacity: .6; }

/* Dropdown */
.has-drop { position: relative; }
.dropdown {
    position: absolute; top: calc(100% + 10px); left: 0;
    min-width: 260px; background: #fff;
    border: 1px solid var(--color-line); border-radius: var(--radius);
    box-shadow: var(--shadow-lg); padding: 10px;
    opacity: 0; visibility: hidden; transform: translateY(8px);
    transition: all var(--transition);
}
.has-drop:hover .dropdown,
.has-drop:focus-within .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown a {
    display: block; padding: 11px 14px; border-radius: var(--radius-sm);
    font-size: .92rem; color: var(--color-text); font-weight: 500;
}
.dropdown a:hover { background: var(--color-bg-alt); color: var(--color-brand); }
.dropdown a small { display: block; color: var(--color-muted); font-weight: 400; font-size: .8rem; }

.nav__cta { display: flex; align-items: center; gap: 14px; }
.nav__cta .lang-toggle { font-size: .85rem; font-weight: 700; color: var(--color-ink); padding: 6px 0; }
.nav__cta .lang-toggle:hover { color: var(--color-brand); }

/* Mobile toggle */
.nav-toggle {
    display: none; background: none; border: 0; cursor: pointer;
    width: 44px; height: 44px; flex-direction: column; justify-content: center; gap: 5px;
    align-items: center;
}
.nav-toggle span { width: 24px; height: 2px; background: var(--color-ink); transition: var(--transition); border-radius: 2px; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
    position: relative;
    background:
      radial-gradient(1200px 600px at 80% -10%, rgba(20,184,196,.18), transparent 60%),
      linear-gradient(135deg, #0B2545 0%, #13315C 55%, #0E4A52 100%);
    color: #fff; overflow: hidden;
}
.hero::after {
    content: ""; position: absolute; inset: 0;
    background-image: url("../images/pattern-molecules.svg");
    background-size: 360px; opacity: .07; pointer-events: none;
}
.hero .container { position: relative; z-index: 2; }
.hero__inner { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; padding: 110px 0 120px; }
.hero__eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 7px 16px; border-radius: 999px;
    background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.2);
    font-size: .8rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
    margin-bottom: 26px;
}
.hero__eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--color-brand-2); box-shadow: 0 0 0 4px rgba(20,184,196,.3); }
.hero h1 { color: #fff; margin-bottom: 22px; }
.hero h1 .hl { color: var(--color-brand-2); }
.hero__lead { font-size: 1.12rem; color: #C9D6E4; max-width: 560px; margin-bottom: 34px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 44px; }
.hero__stats { display: flex; gap: 40px; flex-wrap: wrap; }
.hero__stats .stat .num { font-size: 2.1rem; font-weight: 800; color: #fff; font-family: var(--font-display); line-height: 1; }
.hero__stats .stat .num span { color: var(--color-brand-2); }
.hero__stats .stat .lbl { font-size: .85rem; color: #9FB1C4; margin-top: 6px; }

.hero__visual { position: relative; }
.hero__card {
    border-radius: var(--radius-lg); overflow: hidden;
    box-shadow: var(--shadow-lg); position: relative;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg,#14B8C4,#0E7C86);
}
.hero__card img { width: 100%; height: 100%; object-fit: cover; }
.hero__badge {
    position: absolute; bottom: 22px; left: 22px; right: 22px;
    background: rgba(11,37,69,.82); backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,.15); border-radius: var(--radius);
    padding: 18px 20px; display: flex; gap: 16px; align-items: center;
}
.hero__badge .ico { width: 46px; height: 46px; flex: none; border-radius: 12px; background: rgba(20,184,196,.2); display: grid; place-items: center; color: var(--color-brand-2); }
.hero__badge .ico svg { width: 26px; height: 26px; }
.hero__badge b { display: block; font-size: .95rem; }
.hero__badge small { color: #9FB1C4; font-size: .8rem; }

/* hero wave divider */
.hero__wave { position: absolute; bottom: -1px; left: 0; right: 0; z-index: 1; line-height: 0; }
.hero__wave svg { width: 100%; height: 70px; display: block; }

/* ---------- Page hero (inner pages) ---------- */
.page-hero {
    position: relative; color: #fff; overflow: hidden;
    background: radial-gradient(900px 500px at 85% -20%, rgba(20,184,196,.2), transparent 60%),
                linear-gradient(135deg, #0B2545 0%, #13315C 100%);
}
.page-hero::after { content:""; position:absolute; inset:0; background-image:url("../images/pattern-molecules.svg"); background-size:320px; opacity:.06; }
.page-hero .container { position: relative; z-index: 2; padding: 80px 24px 70px; }
.page-hero .eyebrow { color: var(--color-brand-2); font-size:0.875rem; font-weight:700; letter-spacing:.14em; text-transform:uppercase; }
.page-hero h1 { color: #fff; margin: 14px 0 14px; }
.page-hero p { color: #C9D6E4; max-width: 640px; margin: 0; font-size: 1.05rem; }
.page-hero:has(.page-hero__intro) .container { padding-top: 32px; padding-bottom: 64px; }
.page-hero__top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px 24px;
    flex-wrap: wrap;
    margin-bottom: 36px;
}
.page-hero:has(.page-hero__intro) .breadcrumb { margin: 0; }
.page-hero__meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: .85rem;
    color: #9FB1C4;
    flex-shrink: 0;
}
.page-hero__meta a {
    color: #9FB1C4;
    font-weight: 500;
}
.page-hero__meta a:hover { color: #fff; }
.page-hero__meta span { opacity: .5; }
.page-hero__meta--tag {
    font-size: .85rem;
    color: #9FB1C4;
    font-weight: 500;
    letter-spacing: 0;
    text-transform: none;
}
.page-hero__intro {
    text-align: center;
    max-width: 760px;
    margin: 0 auto;
}
.page-hero__intro h1 {
    margin: 12px 0 16px;
    font-size: clamp(1.5rem, 3vw, 2.15rem);
    line-height: 1.35;
    word-break: keep-all;
}
.page-hero__intro p {
    margin: 0 auto;
    max-width: 680px;
    line-height: 1.75;
}
.breadcrumb { display:flex; gap:8px; align-items:center; font-size:.85rem; color:#9FB1C4; margin-top:22px; }
.breadcrumb a:hover { color:#fff; }
.breadcrumb span { opacity:.5; }

/* ---------- Stats strip ---------- */
.stats-strip { background: var(--color-ink); color: #fff; }
.stats-strip .container { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; padding: 40px 24px; }
.stats-strip .item { text-align: center; border-right: 1px solid rgba(255,255,255,.1); }
.stats-strip .item:last-child { border-right: 0; }
.stats-strip .num { font-size: 2.6rem; font-weight: 800; color: #fff; font-family: var(--font-display); }
.stats-strip .num span { color: var(--color-brand-2); }
.stats-strip .lbl { color: #9FB1C4; font-size: .9rem; margin-top: 6px; }

/* ---------- Feature cards ---------- */
.card {
    background: #fff; border: 1px solid var(--color-line);
    border-radius: var(--radius); padding: 34px 30px;
    transition: all var(--transition); height: 100%;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.card__icon {
    width: 60px; height: 60px; border-radius: 16px;
    display: grid; place-items: center; margin-bottom: 22px;
    background: linear-gradient(135deg, rgba(14,124,134,.12), rgba(20,184,196,.12));
    color: var(--color-brand);
}
.card__icon svg { width: 30px; height: 30px; }
.card h3 { margin-bottom: 10px; }
.card p { color: var(--color-muted); margin: 0; font-size: .96rem; }

/* Icon + title on one row (feature cards) */
.card:has(> .card__icon + h3) {
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto 1fr;
    column-gap: 14px;
    align-items: center;
}
.card:has(> .card__icon + h3) > .card__icon {
    grid-column: 1;
    grid-row: 1;
    width: 52px;
    height: 52px;
    margin-bottom: 0;
    border-radius: 14px;
}
.card:has(> .card__icon + h3) > .card__icon svg { width: 26px; height: 26px; }
.card:has(> .card__icon + h3) > h3 {
    grid-column: 2;
    grid-row: 1;
    margin: 0;
    font-size: 1.08rem;
    line-height: 1.3;
}
.card:has(> .card__icon + h3) > p {
    grid-column: 1 / -1;
    grid-row: 2;
    margin-top: 14px;
}

/* ---------- Product cards ---------- */
.product-card {
    background: #fff; border: 1px solid var(--color-line);
    border-radius: var(--radius); overflow: hidden;
    transition: all var(--transition); display: flex; flex-direction: column; height: 100%;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.product-card__link {
    display: flex; flex-direction: column; height: 100%; color: inherit;
}
.product-card__link:hover { color: inherit; }
.product-card__link .text-link { margin-top: auto; pointer-events: none; }
.product-card--mini { display: flex; flex-direction: column; height: 100%; color: inherit; transition: all var(--transition); }
.product-card--mini:hover { transform: translateY(-4px); box-shadow: var(--shadow); color: inherit; }
.product-card--mini .product-card__media { aspect-ratio: 16/9; }
.product-card--mini .product-card__body { padding: 18px 20px 22px; }
.product-card--mini h3 { font-size: 1rem; margin-bottom: 6px; }
.product-card--mini p { font-size: .86rem; color: var(--color-muted); margin: 0; }
.product-card__media { aspect-ratio: 16/10; position: relative; overflow: hidden; }
.product-card__media img { width:100%; height:100%; object-fit:cover; object-position:50% 65%; transition: transform .5s ease; }
.product-card:hover .product-card__media img { transform: scale(1.06); }
.product-card__tag {
    position: absolute; top: 14px; left: 14px;
    background: rgb(14 124 134); color:#fff;
    font-size:.72rem; font-weight:700; letter-spacing:.06em; text-transform:uppercase;
    padding: 6px 12px; border-radius: 999px;
}
.product-card__body { padding: 26px 26px 30px; display:flex; flex-direction:column; flex:1; }
.product-card__body h3 { margin-bottom: 8px; font-size: 1.2rem; }
.product-card__body p { color: var(--color-muted); font-size: .94rem; margin-bottom: 18px; flex:1; }
.product-card__list { margin-bottom: 18px; }
.product-card__list li { font-size:.86rem; color:var(--color-text); padding: 5px 0 5px 22px; position: relative; }
.product-card__list li::before { content:""; position:absolute; left:0; top:11px; width:12px; height:12px; border-radius:3px; background:linear-gradient(135deg,var(--color-brand),var(--color-brand-2)); }
.product-card__list li small { color:var(--color-muted); }

/* ---------- Application grid ---------- */
.app-grid { display:grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.app-tile {
    position: relative; border-radius: var(--radius); overflow: hidden;
    min-height: 280px; display: flex; align-items: flex-end;
    color: #fff; isolation: isolate;
}
.app-tile__img { position:absolute; inset:0; z-index:-2; }
.app-tile__img img { width:100%; height:100%; object-fit:cover; }
.app-tile::after { content:""; position:absolute; inset:0; z-index:-1;
    background: linear-gradient(180deg, rgba(11,37,69,.1) 0%, rgba(11,37,69,.85) 100%); }
.app-tile__body { padding: 28px; }
.app-tile__body .tag { font-size:.72rem; font-weight:700; letter-spacing:.1em; text-transform:uppercase; color: var(--color-brand-2); margin-bottom:8px; }
.app-tile__body h3 { color:#fff; margin:0 0 8px; font-size:1.3rem; }
.app-tile__body p { color:#C9D6E4; margin:0; font-size:.92rem; max-height:0; overflow:hidden; transition: max-height var(--transition), margin var(--transition); }
.app-tile:hover .app-tile__body p { max-height: 120px; margin-top: 4px; }

/* ---------- Application landing pages ---------- */
.app-hero {
    position: relative;
    background: linear-gradient(135deg, #0B2545 0%, #123A63 55%, #0E7C86 100%);
    color: #fff;
    overflow: hidden;
}
.app-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: var(--app-hero-image);
    background-size: cover;
    background-position: center;
    opacity: .14;
}
.app-hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image: url("../images/pattern-molecules.svg");
    background-size: 320px;
    opacity: .08;
}
.app-hero .container { position: relative; z-index: 2; padding: 36px 24px 48px; }
.app-hero .breadcrumb a { color: #C9D6E4; }
.app-hero .breadcrumb a:hover { color: #fff; }
.app-hero .breadcrumb span { color: rgba(255,255,255,.45); }
.app-hero__grid {
    display: grid;
    grid-template-columns: 1.05fr .95fr;
    gap: 48px;
    align-items: center;
    margin-top: 28px;
}
.app-hero__copy .eyebrow { color: var(--color-brand-2); }
.app-hero__series {
    display: inline-block;
    margin-top: 12px;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(255,255,255,.1);
    font-size: .78rem;
    letter-spacing: .06em;
    text-transform: uppercase;
}
.app-hero__copy h1 { color: #fff; margin: 16px 0 14px; max-width: 18em; }
.app-hero__copy p { color: #C9D6E4; font-size: 1.05rem; line-height: 1.65; max-width: 560px; }
.app-hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.app-hero__visual {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    aspect-ratio: 4/3;
    border: 1px solid rgba(255,255,255,.12);
}
.app-hero__visual img { width: 100%; height: 100%; object-fit: cover; display: block; }
.app-hero + .app-nav-band,
.page-hero + .app-nav-band,
.page-hero + .section--tight {
  padding: 36px 0 28px;
}
.app-hero:has(+ .app-nav-band) .container,
.page-hero:has(+ .app-nav-band) .container,
.page-hero:has(+ .section--tight) .container {
  padding-bottom: 44px;
}
.page-hero + .section--tight .filter-bar,
.app-hero + .app-nav-band .filter-bar,
.page-hero + .app-nav-band .filter-bar {
  margin-bottom: 0;
}
.app-nav-band {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
}
.app-nav-band .filter-bar {
  margin-bottom: 0;
  gap: 8px;
}
.app-nav-band .filter-bar a {
  padding: 8px 14px;
  font-size: .88rem;
}
.app-stats .container {
  padding-top: 32px;
  padding-bottom: 32px;
  grid-template-columns: repeat(4, 1fr);
}
html:not(:lang(zh-CN)):not(:lang(zh-Hant)) .app-stats .num {
  font-size: 1.95rem;
  line-height: 1.18;
  letter-spacing: -0.02em;
}
html:not(:lang(zh-CN)):not(:lang(zh-Hant)) .app-stats .num span {
  font-size: 0.9em;
}
html:not(:lang(zh-CN)):not(:lang(zh-Hant)) .app-stats .lbl {
  font-size: 0.78rem;
  line-height: 1.35;
  padding-inline: 8px;
}
html:not(:lang(zh-CN)):not(:lang(zh-Hant)) .app-stats .container {
  gap: 18px;
}
.app-diagram {
  margin: 0 0 22px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-line);
  background: #fff;
}
.app-diagram img { display: block; width: 100%; height: auto; }
.app-diagram figcaption {
  padding: 10px 16px 12px;
  font-size: .82rem;
  color: var(--color-muted);
  border-top: 1px solid var(--color-line);
  background: var(--color-bg-alt);
}
.app-faq .app-diagram { margin-bottom: 18px; }
.lead { color: var(--color-muted); font-size: 1.02rem; line-height: 1.75; margin: 0 0 18px; }
.app-overview__head {
    max-width: 720px;
    margin-bottom: 24px;
}
.app-overview__head .eyebrow { margin-bottom: 8px; }
.app-overview__head h2 { margin-bottom: 14px; }
.app-overview__head .lead { margin-bottom: 0; font-size: 1.05rem; }
.app-overview .app-benefit-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin: 0 0 24px;
}
@media (min-width: 900px) {
    .app-overview .app-benefit-grid { grid-template-columns: repeat(4, 1fr); }
}
.app-benefit-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin: 8px 0 20px;
}
.app-benefit {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 16px 18px;
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    background: #fff;
}
.app-benefit__icon {
    flex: 0 0 22px;
    width: 22px;
    height: 22px;
    margin-top: 2px;
    border-radius: 50%;
    background: var(--color-brand);
    position: relative;
}
.app-benefit__icon::after {
    content: "";
    position: absolute;
    left: 7px;
    top: 4px;
    width: 5px;
    height: 9px;
    border: solid #fff;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}
.app-benefit p { margin: 0; color: var(--color-ink); font-size: .94rem; line-height: 1.55; }
.app-inline-cta { margin: 0; }
.app-spec { margin-top: 8px; }
.app-spec thead th:last-child,
.app-spec tbody td:last-child { width: 58%; }
.container--narrow { max-width: 820px; }
.app-faq__list { display: grid; gap: 12px; }
.app-faq__item summary { cursor: pointer; }
.app-explore-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
}
.app-explore {
    display: block;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--color-line);
    background: #fff;
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
}
.app-explore:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    border-color: transparent;
}
.app-explore__media { aspect-ratio: 16/10; overflow: hidden; }
.app-explore__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.app-explore:hover .app-explore__media img { transform: scale(1.04); }
.app-explore__body { padding: 14px 16px 18px; }
.app-explore__body .eyebrow { font-size: .68rem; margin-bottom: 6px; display: block; }
.app-explore__body h3 { margin: 0; font-size: .98rem; line-height: 1.35; }
.app-cta .container { align-items: center; }
.app-cta__actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: flex-end; }
.app-cta .btn--outline {
    color: #fff;
    border-color: rgba(255,255,255,.45);
    background: transparent;
}
.app-cta .btn--outline:hover {
    background: #fff;
    color: var(--color-ink);
    border-color: #fff;
}

/* ---------- Split / About ---------- */
.split { display:grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items:center; }
.split__media { border-radius: var(--radius-lg); overflow:hidden; box-shadow: var(--shadow-lg); aspect-ratio: 4/3; }
.split__media img { width:100%; height:100%; object-fit:cover; }
.split ul.check li { padding: 10px 0 10px 32px; position: relative; border-bottom: 1px dashed var(--color-line); }
.split ul.check li::before { content:""; position:absolute; left:0; top:14px; width:20px; height:20px; border-radius:50%; background:var(--color-brand); }
.split ul.check li::after { content:""; position:absolute; left:6px; top:19px; width:6px; height:10px; border:solid #fff; border-width:0 2px 2px 0; transform: rotate(45deg); }
.split ul.check li:last-child { border-bottom: 0; }

/* ---------- Values ---------- */
.value-card { text-align:left; padding: 32px 28px; border-radius: var(--radius); background:#fff; border:1px solid var(--color-line); height:100%; transition: var(--transition); }
.value-card:hover { box-shadow: var(--shadow); border-color: transparent; }
.value-card .num { font-size: .85rem; font-weight:800; color: var(--color-brand); letter-spacing:.1em; }
.value-card h3 { margin: 10px 0 10px; }
.value-card p { color: var(--color-muted); margin:0; font-size:.95rem; }

/* Step number + title on one row (R&D process, about values) */
.value-card:has(> .num + h3) {
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto 1fr;
    column-gap: 12px;
    row-gap: 0;
    align-items: baseline;
}
.value-card:has(> .num + h3) > .num {
    grid-column: 1;
    grid-row: 1;
    white-space: nowrap;
}
.value-card:has(> .num + h3) > h3 {
    grid-column: 2;
    grid-row: 1;
    margin: 0;
    font-size: 1.08rem;
    line-height: 1.3;
}
.value-card:has(> .num + h3) > p {
    grid-column: 1 / -1;
    grid-row: 2;
    margin-top: 12px;
}

/* ---------- Timeline ---------- */
.timeline { position: relative; max-width: 860px; margin: 0 auto; }
.timeline::before { content:""; position:absolute; left: 20px; top:0; bottom:0; width:2px; background: var(--color-line); }
.tl-item { position: relative; padding: 0 0 40px 64px; display: grid; grid-template-columns: auto 1fr; column-gap: 14px; row-gap: 6px; align-items: baseline; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before { content:""; position:absolute; left:12px; top:6px; width:18px; height:18px; border-radius:50%; background:#fff; border:4px solid var(--color-brand); box-shadow: 0 0 0 4px rgba(14,124,134,.15); }
.tl-item .year { grid-column: 1; grid-row: 1; font-family: var(--font-display); font-weight:800; font-size:1.3rem; color: var(--color-brand); white-space: nowrap; }
.tl-item h4 { grid-column: 2; grid-row: 1; margin: 0; font-size:1.05rem; color: var(--color-ink); }
.tl-item p { grid-column: 1 / -1; grid-row: 2; color: var(--color-muted); margin:0; font-size:.94rem; }

/* ---------- Tables / specs ---------- */
.spec-table { width:100%; border-collapse: collapse; background:#fff; border-radius: var(--radius); overflow:hidden; box-shadow: var(--shadow-sm); }
.spec-table th, .spec-table td { padding: 16px 20px; text-align:left; border-bottom: 1px solid var(--color-line); font-size:.94rem; }
.spec-table thead th { background: var(--color-ink); color:#fff; font-weight:600; }
.spec-table tbody tr:hover { background: var(--color-bg-alt); }
.spec-table td code { background: var(--color-bg-alt); padding: 2px 8px; border-radius: 6px; font-size:.85rem; color: var(--color-brand); }
.spec-table td code a, .spec-table td a code { color: var(--color-brand); }
.spec-table td a:hover code { color: var(--color-brand-dark); }

/* Product detail page */
.product-detail { display: grid; grid-template-columns: 1fr 1.15fr; gap: 48px; align-items: start; }
.product-detail__media {
    position: sticky;
    top: calc(var(--nav-offset, 116px) + 16px);
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-self: start;
}
.product-detail__visual {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background: #fff;
}
.product-detail__visual img { width: 100%; display: block; }
.product-detail__visual-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(11,37,69,.85);
    color: #fff;
    backdrop-filter: blur(6px);
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    padding: 6px 12px;
    border-radius: 999px;
}
.product-detail__quick {
    background: #fff;
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    padding: 20px 20px 16px;
    box-shadow: var(--shadow-sm);
}
.product-detail__quick .eyebrow { margin-bottom: 12px; }
.product-detail__quick-specs { margin: 0; }
.product-detail__quick-item {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 16px;
    padding: 9px 0;
    border-bottom: 1px solid var(--color-line);
    font-size: .9rem;
}
.product-detail__quick-item:last-child { border-bottom: 0; }
.product-detail__quick-item dt {
    color: var(--color-muted);
    font-weight: 500;
    flex-shrink: 0;
}
.product-detail__quick-item dd {
    margin: 0;
    font-weight: 600;
    color: var(--color-ink);
    text-align: right;
}
.product-detail__quick-pack {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 16px;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px dashed var(--color-line);
    font-size: .9rem;
}
.product-detail__quick-pack-label {
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--color-brand);
    flex-shrink: 0;
}
.product-detail__quick-pack-value {
    font-weight: 600;
    color: var(--color-ink);
    text-align: right;
}
.product-detail__actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}
.product-detail__actions .btn {
    justify-content: center;
    padding: 13px 16px;
    font-size: .88rem;
    white-space: normal;
    text-align: center;
    line-height: 1.35;
}
.product-detail__actions .btn--whatsapp {
    border-color: #25D366;
    color: #128C7E;
}
.product-detail__faq {
    border-top: 1px solid var(--color-line);
    margin-top: 4px;
}
.product-detail__faq-item {
    border-bottom: 1px solid var(--color-line);
    padding: 14px 0;
}
.product-detail__faq-item summary {
    cursor: pointer;
    font-weight: 600;
    font-size: .92rem;
    line-height: 1.45;
}
.product-detail__faq-item p {
    margin: 10px 0 0;
    color: var(--color-muted);
    font-size: .9rem;
    line-height: 1.6;
}

.product-detail__panel {
    background: #fff;
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    padding: 28px 32px 24px;
}
.product-detail__section--lead h2 {
    font-size: 1.35rem;
    margin: 0 0 10px;
    line-height: 1.3;
}
.product-detail__section--lead p {
    margin: 0;
    color: var(--color-muted);
    font-size: .94rem;
    line-height: 1.65;
}
.product-detail__panel .product-detail__section > .eyebrow {
    margin-bottom: 10px;
}

.product-detail__section--specs .product-detail__quick-specs {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 28px;
    margin: 0;
}
.product-detail__section--specs .product-detail__quick-item {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 12px;
    padding: 8px 0;
    border-bottom: 1px solid var(--color-line);
    font-size: .88rem;
}
.product-detail__section--specs .product-detail__quick-item dt {
    color: var(--color-muted);
    font-weight: 500;
    flex-shrink: 0;
}
.product-detail__section--specs .product-detail__quick-item dd {
    margin: 0;
    text-align: right;
    font-weight: 600;
    color: var(--color-ink);
}

.product-detail ul.check {
    margin: 0;
    padding: 0;
    list-style: none;
}
.product-detail ul.check li {
    padding: 6px 0 6px 18px;
    position: relative;
    font-size: .9rem;
    line-height: 1.5;
    color: var(--color-text);
    border-bottom: 1px solid var(--color-line);
}
.product-detail ul.check li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 13px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-brand);
}
.product-detail ul.check li::after { display: none; }
.product-detail ul.check li:last-child { border-bottom: 0; }

.product-detail__list {
    margin: 0;
    padding: 0;
    list-style: none;
}
.product-detail__list li {
    padding: 5px 0;
    font-size: .9rem;
    line-height: 1.5;
    color: var(--color-text);
    border-bottom: 1px solid var(--color-line);
}
.product-detail__list li:last-child { border-bottom: 0; }

.product-detail__notes {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--color-line);
}
.product-detail__note {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    padding: 0;
    background: none;
    border: 0;
    border-radius: 0;
}
.product-detail__note-icon {
    flex: none;
    width: auto;
    height: auto;
    padding-top: 2px;
    background: none;
    color: var(--color-brand);
}
.product-detail__note-icon svg { width: 16px; height: 16px; }
.product-detail__note strong {
    display: block;
    font-size: .82rem;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: 2px;
}
.product-detail__note p {
    margin: 0;
    font-size: .86rem;
    line-height: 1.55;
    color: var(--color-muted);
}

.product-detail__cols {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--color-line);
}
.product-detail__section + .product-detail__section {
    margin-top: 22px;
    padding-top: 22px;
    border-top: 1px solid var(--color-line);
}
.product-detail__cols .product-detail__section {
    margin-top: 0;
    padding-top: 0;
    border-top: 0;
}

.product-detail__spec-list { margin: 0; }
.product-detail__spec-item {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 16px;
    padding: 8px 0;
    border-bottom: 1px solid var(--color-line);
    font-size: .88rem;
}
.product-detail__spec-item:last-child { border-bottom: 0; }
.product-detail__spec-item dt {
    color: var(--color-muted);
    font-weight: 500;
}
.product-detail__spec-item dd {
    margin: 0;
    font-weight: 600;
    color: var(--color-ink);
    text-align: right;
}

.product-detail__footer {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 8px 16px;
    margin-top: 22px;
    padding-top: 18px;
    border-top: 1px solid var(--color-line);
}
.product-detail__footer-label {
    font-size: .78rem;
    font-weight: 600;
    color: var(--color-muted);
}
.product-detail__footer-value {
    font-size: .9rem;
    font-weight: 600;
    color: var(--color-ink);
}

.spec-table--kv th { width: 42%; background: var(--color-bg-alt); color: var(--color-ink); font-weight: 600; }
.spec-table--kv td { background: #fff; }

/* ---------- News ---------- */
.news-card { background:#fff; border:1px solid var(--color-line); border-radius: var(--radius); overflow:hidden; transition: var(--transition); height:100%; display:flex; flex-direction:column; }
.news-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.news-card__media { aspect-ratio: 16/9; overflow:hidden; }
.news-card__media img { width:100%; height:100%; object-fit:cover; transition: transform .5s ease; }
.news-card:hover .news-card__media img { transform: scale(1.05); }
.news-card__body { padding: 24px 26px 28px; flex:1; display:flex; flex-direction:column; }
.news-card__meta { display:flex; gap:14px; font-size:.8rem; color:var(--color-muted); margin-bottom:12px; }
.news-card__meta .cat { color: var(--color-brand); font-weight:700; }
.news-card__body h3 { font-size:1.12rem; margin-bottom:10px; line-height:1.35; }
.news-card__body p { color: var(--color-muted); font-size:.92rem; margin:0; flex:1; }
.news-card__link { display:flex; flex-direction:column; height:100%; color:inherit; }
.news-card__link:hover { color:inherit; }
.news-card--mini { display:flex; flex-direction:column; height:100%; color:inherit; transition: var(--transition); }
.news-card--mini:hover { transform: translateY(-4px); box-shadow: var(--shadow); color:inherit; }
.news-card--mini .news-card__body { padding:18px 20px 22px; }
.news-card--mini h3 { font-size:1rem; margin:0; }
.news-article { max-width: 800px; margin: 0 auto; }
.news-article__media { margin-bottom: 32px; border-radius: var(--radius-lg); overflow:hidden; box-shadow: var(--shadow); }
.news-article__media img { width:100%; display:block; }
.news-article__body p { color: var(--color-text); font-size: 1.02rem; line-height: 1.8; margin-bottom: 1.25rem; }
.news-article__body p:last-child { margin-bottom: 0; }

/* ---------- CTA band ---------- */
.cta-band { position: relative; overflow:hidden; color:#fff;
    background: linear-gradient(120deg, var(--color-brand) 0%, var(--color-brand-2) 100%); }
.cta-band::after { content:""; position:absolute; inset:0; background-image:url("../images/pattern-molecules.svg"); background-size:300px; opacity:.1; }
.cta-band .container { position:relative; z-index:2; display:flex; align-items:center; justify-content:space-between; gap:32px; padding: 64px 24px; flex-wrap:wrap; }
.cta-band h2 { color:#fff; margin:0; }
.cta-band p { color: rgba(255,255,255,.9); margin: 8px 0 0; }

/* ---------- Contact ---------- */
.contact-grid { display:grid; grid-template-columns: 1fr 1.1fr; gap: 48px; }
.info-list li { display:flex; gap:16px; padding: 20px 0; border-bottom: 1px solid var(--color-line); }
.info-list li:last-child { border-bottom:0; }
.info-list .ico { width:46px; height:46px; flex:none; border-radius:12px; background: var(--color-bg-alt); display:grid; place-items:center; color:var(--color-brand); }
.info-list .ico svg { width:22px; height:22px; }
.info-list h4 { margin:0 0 4px; font-size:1rem; }
.info-list p { margin:0; color:var(--color-muted); font-size:.94rem; }
.form { background:#fff; border:1px solid var(--color-line); border-radius: var(--radius-lg); padding: 36px; box-shadow: var(--shadow); }
.form-row { display:grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom:18px; }
.field { margin-bottom: 18px; }
.field label { display:block; font-weight:600; font-size:.88rem; margin-bottom:8px; color:var(--color-ink); }
.field input, .field textarea, .field select {
    width:100%; padding: 13px 16px; border:1px solid var(--color-line);
    border-radius: var(--radius-sm); font-family:inherit; font-size:.95rem; color:var(--color-text);
    background:#fff; transition: var(--transition);
}
.field input:focus, .field textarea:focus, .field select:focus { outline:none; border-color:var(--color-brand); box-shadow: 0 0 0 3px rgba(14,124,134,.12); }
.field textarea { resize: vertical; min-height: 120px; }

/* ---------- Map ---------- */
.map-wrap { border-radius: var(--radius-lg); overflow:hidden; box-shadow: var(--shadow); border:1px solid var(--color-line); }
.map-wrap iframe { display:block; width:100%; height: 420px; border:0; }

/* ---------- Footer ---------- */
.footer { background: #081C33; color: #9FB1C4; padding-top: 72px; }
.footer a { color: #9FB1C4; }
.footer a:hover { color: #fff; }
.footer__top { display:grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 52px; border-bottom:1px solid rgba(255,255,255,.08); }
.footer__brand .brand__name b { color:#fff; }
.footer__brand p { font-size:.92rem; margin: 18px 0 22px; max-width: 320px; }
.footer__brand { overflow: visible; }
.footer__brand .social { display:flex; gap:12px; align-items:flex-start; }
.footer__brand .social > a { width:38px; height:38px; border-radius:10px; background:rgba(255,255,255,.06); display:grid; place-items:center; }
.footer__brand .social > a:hover { background: var(--color-brand); color:#fff; }
.footer__brand .social > a:hover svg rect { fill: #fff; }
.footer__brand .social > a:hover svg text { fill: var(--color-brand); }
.footer__brand .social svg { width:18px; height:18px; }

.social-popover { position: relative; }
.social-popover__trigger {
    width:38px; height:38px; border-radius:10px; background:rgba(255,255,255,.06);
    display:grid; place-items:center; color: inherit;
}
.social-popover__trigger:hover { background: var(--color-brand); color:#fff; }
.social-popover__panel {
    position: absolute;
    left: 50%;
    bottom: calc(100% + 10px);
    transform: translateX(-50%) translateY(6px);
    min-width: max-content;
    padding: 10px 14px;
    border-radius: 10px;
    background: #fff;
    color: var(--color-ink);
    font-size: .82rem;
    line-height: 1.4;
    white-space: nowrap;
    box-shadow: var(--shadow);
    border: 1px solid var(--color-line);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
    z-index: 20;
}
.social-popover__panel::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 100%;
    transform: translateX(-50%);
    border: 7px solid transparent;
    border-top-color: #fff;
}
.social-popover__panel a { color: var(--color-brand); font-weight: 600; }
.social-popover__panel a:hover { color: var(--color-brand-dark); }
.social-popover__panel--qr { padding: 8px; white-space: normal; }
.social-popover__panel--qr img { display: block; width: 168px; height: 168px; object-fit: contain; border-radius: 6px; }
.social-popover:hover .social-popover__panel,
.social-popover:focus-within .social-popover__panel {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}
.footer h4 { color:#fff; font-size:.95rem; margin-bottom: 20px; letter-spacing:.04em; }
.footer__links li { margin-bottom: 12px; font-size:.92rem; }
.footer__contact li { display:flex; gap:10px; margin-bottom:14px; font-size:.9rem; line-height:1.5; }
.footer__contact svg { width:16px; height:16px; flex:none; margin-top:3px; color:var(--color-brand-2); }
.footer__bottom { display:flex; justify-content:space-between; align-items:center; gap:16px; padding: 24px 0; font-size:.84rem; flex-wrap:wrap; }
.footer__bottom .links { display:flex; gap:20px; }

/* ---------- Legal pages ---------- */
.legal-doc { max-width: 820px; margin: 0 auto; }
.legal-doc .updated { color: var(--color-muted); font-size: .9rem; margin-bottom: 28px; }
.legal-doc h2 {
    font-size: 1.22rem;
    font-weight: 600;
    margin: 30px 0 10px;
    padding-top: 22px;
    border-top: 1px solid var(--color-line);
    color: var(--color-ink);
    letter-spacing: 0;
    line-height: 1.45;
}
.legal-doc h2:first-of-type { margin-top: 0; padding-top: 0; border-top: 0; }
.legal-doc h3 {
    font-size: 1.02rem;
    font-weight: 600;
    margin: 20px 0 7px;
    color: var(--color-ink-2);
    line-height: 1.45;
}
.legal-doc p, .legal-doc li { color: var(--color-muted); font-size: .96rem; line-height: 1.75; }
.legal-doc ul, .legal-doc ol { margin: 0 0 1rem; padding-left: 1.4em; }
.legal-doc li { margin-bottom: 6px; }
.legal-doc a { color: var(--color-brand); font-weight: 500; }
.legal-doc a:hover { text-decoration: underline; }

/* ---------- Back to top ---------- */
.to-top {
    position: fixed; right: 26px; bottom: 26px; z-index: 90;
    width: 48px; height: 48px; border-radius: 50%;
    background: var(--color-ink); color:#fff; border:0; cursor:pointer;
    display:grid; place-items:center; box-shadow: var(--shadow);
    opacity:0; visibility:hidden; transform: translateY(12px); transition: var(--transition);
}
.to-top.show { opacity:1; visibility:visible; transform: translateY(0); }
.to-top:hover { background: var(--color-brand); }
.to-top svg { width:22px; height:22px; }

/* ---------- Animations ---------- */
@keyframes fadeUp { from { opacity:0; transform: translateY(24px);} to { opacity:1; transform: translateY(0);} }
.reveal { opacity:0; }
.reveal.in { animation: fadeUp .7s cubic-bezier(.2,.7,.2,1) forwards; }

/* ---------- Mobile nav overlay ---------- */
body.menu-open { overflow: hidden; }
.nav-overlay {
    position: fixed; inset: 0; z-index: 98;
    background: rgba(11, 37, 69, .45);
    opacity: 0; visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
}
.nav-overlay.show { opacity: 1; visibility: visible; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .footer__top { grid-template-columns: 1fr 1fr; }
    .hero__inner { grid-template-columns: 1fr; gap: 36px; padding: 80px 0 90px; }
    .hero__visual { max-width: 520px; margin: 0 auto; width: 100%; }
    .contact-grid { grid-template-columns: 1fr; }
    .section-head { margin-bottom: 28px; }
}
@media (max-width: 860px) {
    .section { padding: 44px 0; }
    .section--tight { padding: 36px 0; }
    .product-search-band,
    .product-search-band.section--tight { padding: 28px 0 20px; margin-top: 12px; }
    .product-search-band + .section--tight { padding-top: 24px; }
    .page-hero .container { padding: 48px 28px 40px; }
    .nav-toggle { display: flex; }
    .nav__cta .btn { display: none; }
    .menu {
        position: fixed; top: var(--nav-offset, 116px); left: 0; right: 0;
        z-index: 99;
        background: #fff; flex-direction: column; align-items: stretch;
        gap: 0; padding: 8px 0 20px; box-shadow: var(--shadow-lg);
        border-top: 1px solid var(--color-line);
        max-height: calc(100dvh - var(--nav-offset, 116px));
        overflow-y: auto; -webkit-overflow-scrolling: touch;
        transform: translateX(100%);
        opacity: 0; pointer-events: none;
        transition: transform var(--transition), opacity var(--transition);
    }
    .menu.open {
        transform: translateX(0);
        opacity: 1; pointer-events: auto;
    }
    .menu > li > a {
        padding: 15px 20px; border-radius: 0;
        border-bottom: 1px solid var(--color-line);
        font-size: 1rem; min-height: 48px;
    }
    .menu > li:last-child > a { border-bottom: 0; }
    .menu .caret { margin-left: auto; transition: transform var(--transition); }
    .has-drop.open > a .caret { transform: rotate(180deg); }
    .dropdown {
        position: static; opacity: 1; visibility: visible; transform: none;
        box-shadow: none; border: 0; padding: 0;
        min-width: 0; display: none;
        background: var(--color-bg-alt);
    }
    .has-drop.open .dropdown { display: block; }
    .dropdown a {
        padding: 12px 20px 12px 32px;
        border-bottom: 1px solid var(--color-line);
        font-size: .9rem;
    }
    .dropdown a:last-child { border-bottom: 0; }
    .topbar__info { display: none; }
    .topbar .container { justify-content: center; height: 36px; }
    .lang-banner__inner { flex-direction: column; align-items: stretch; text-align: center; gap: 10px; padding: 10px 0; }
    .lang-banner__actions { justify-content: center; flex-wrap: wrap; }
    .cookie-banner__inner { flex-direction: column; align-items: stretch; text-align: center; gap: 12px; }
    .cookie-banner__actions { justify-content: center; }
    .grid-3, .grid-4, .app-grid { grid-template-columns: 1fr 1fr; }
    .split { grid-template-columns: 1fr; gap: 28px; }
    .stats-strip .container { grid-template-columns: 1fr 1fr; gap: 28px 12px; padding: 40px 24px; }
    .stats-strip .item:nth-child(2) { border-right: 0; }
    .cta-band .container { flex-direction: column; text-align: center; align-items: center; padding: 48px 24px; }
    .cta-band .btn { width: 100%; justify-content: center; }
    .form-row { grid-template-columns: 1fr; }
    .form { padding: 28px 22px; }
    .hero__lead { font-size: 1.02rem; }
    .hero__badge { left: 14px; right: 14px; bottom: 14px; padding: 14px 16px; }
    .app-tile { min-height: 220px; }
    .app-tile__body p { max-height: 120px; margin-top: 4px; }
    .filter-bar { justify-content: flex-start; flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; padding-bottom: 4px; margin-bottom: 28px; }
    .filter-bar button,
    .filter-bar a { flex: 0 0 auto; }
    .section-head--row { align-items: flex-start; }
    .map-wrap iframe { height: 300px; }
    .product-detail { grid-template-columns: 1fr; gap: 28px; }
    .product-detail__media { position: static; max-width: none; width: 100%; }
    .product-detail__panel { padding: 22px 20px 20px; }
    .product-detail__cols { grid-template-columns: 1fr; gap: 28px; }
    .product-detail__notes { grid-template-columns: 1fr; }
    .breadcrumb { flex-wrap: wrap; row-gap: 4px; }
    .page-hero h1 { line-height: 1.3; margin: 12px 0; }
    .page-hero p { line-height: 1.65; font-size: 1rem; }
    .page-hero .eyebrow { letter-spacing: .1em; }
    .breadcrumb { margin-top: 18px; }
    .app-hero + .app-nav-band,
    .page-hero + .app-nav-band,
    .page-hero + .section--tight { padding: 28px 0 24px; }
    .app-hero:has(+ .app-nav-band) .container,
    .page-hero:has(+ .app-nav-band) .container,
    .page-hero:has(+ .section--tight) .container { padding-bottom: 36px; }
    .app-hero__grid { grid-template-columns: 1fr; gap: 28px; }
    .app-hero .container { padding-bottom: 40px; }
    .app-benefit-grid { grid-template-columns: 1fr; }
    .app-overview .app-benefit-grid { grid-template-columns: 1fr; }
    .app-explore-grid { grid-template-columns: repeat(2, 1fr); }
    .app-cta__actions { width: 100%; justify-content: stretch; }
    .app-cta__actions .btn { flex: 1 1 auto; justify-content: center; }
}
@media (max-width: 560px) {
    .container { padding: 0 16px; }
    h1 { font-size: 1.85rem; }
    h2 { font-size: 1.5rem; }
    .grid-2, .grid-3, .grid-4, .app-grid { grid-template-columns: 1fr; }
    .hero__inner { padding: 64px 0 72px; gap: 28px; }
    .hero__eyebrow { font-size: .72rem; margin-bottom: 18px; }
    .hero__cta { flex-direction: column; gap: 12px; margin-bottom: 32px; }
    .hero__cta .btn { width: 100%; justify-content: center; white-space: normal; }
    .hero__stats { gap: 20px 28px; }
    .hero__stats .stat .num { font-size: 1.75rem; }
    .brand__name small { display: none; }
    .brand__name b { font-size: 1.05rem; }
    .nav { height: 64px; }
    .brand__logo { width: 36px; height: 36px; }
    .card { padding: 26px 22px; }
    .product-card__body { padding: 20px 20px 24px; }
    .news-card__body { padding: 20px 20px 24px; }
    .app-explore-grid { grid-template-columns: 1fr; }
    .app-hero__actions .btn { width: 100%; justify-content: center; }
    .app-stats .container { grid-template-columns: 1fr 1fr; }
    .footer { padding-top: 52px; }
    .footer__top { grid-template-columns: 1fr; gap: 32px; }
    .footer__bottom { flex-direction: column; text-align: center; }
    .footer__bottom .links { flex-wrap: wrap; justify-content: center; gap: 12px 20px; }
    .to-top { right: max(16px, env(safe-area-inset-right)); bottom: max(16px, env(safe-area-inset-bottom)); width: 44px; height: 44px; }
    .btn { white-space: normal; }
    .btn--lg { padding: 14px 24px; font-size: .95rem; }
    .section-head { margin-bottom: 32px; }
    .section-head--row { flex-direction: column; align-items: flex-start; gap: 12px; }
    .page-hero .container {
        padding: 36px 24px 32px;
        padding-left: max(24px, env(safe-area-inset-left));
        padding-right: max(24px, env(safe-area-inset-right));
    }
    .page-hero h1 { font-size: 1.55rem; line-height: 1.3; }
    .page-hero p { font-size: .92rem; line-height: 1.6; }
    .page-hero__top { margin-bottom: 28px; }
    .page-hero__meta { margin-left: auto; }
    .page-hero__intro h1 { font-size: 1.45rem; }
    .page-hero__intro p { font-size: .92rem; }
    .stats-strip .num { font-size: 2rem; }
    html:not(:lang(zh-CN)):not(:lang(zh-Hant)) .app-stats .num { font-size: 1.6rem; }
    html:not(:lang(zh-CN)):not(:lang(zh-Hant)) .app-stats .lbl { font-size: 0.72rem; }
    .tl-item { padding-left: 52px; }
    .spec-table th, .spec-table td { padding: 12px 14px; font-size: .86rem; }
    .spec-table--kv th { width: 40%; word-break: break-word; }
    .spec-table--kv td { word-break: break-word; }
    .product-detail { gap: 24px; }
    .product-detail__panel { padding: 20px 16px 18px; }
    .product-detail__section--lead h2 { font-size: 1.15rem; }
    .product-detail__section + .product-detail__section { margin-top: 18px; padding-top: 18px; }
    .product-detail__section--specs .product-detail__quick-specs { grid-template-columns: 1fr; gap: 0; }
    .product-detail__quick { padding: 18px 16px 14px; }
    .product-detail__actions { grid-template-columns: 1fr; }
    .product-detail__actions .btn { width: 100%; }
    .product-card--mini .product-card__body { padding: 16px; }
    .product-card--mini h3 { font-size: .95rem; }
}