/* ==========================================================================
   BtoBcms Design System v3 — Premium Industrial B2B
   无构建依赖 · 移动优先 · 流式排版 · 触控友好 · 滚动动效
   ========================================================================== */

:root {
    /* 色彩：深海军蓝 + 琥珀金 */
    --primary: #0d4a8f;
    --primary-dark: #083767;
    --primary-deep: #051f3d;
    --primary-soft: #e9f1fb;
    --primary-100: #d5e5f7;
    --accent: #f0a714;
    --accent-deep: #c78a06;
    --accent-soft: #fdf4df;
    --success: #16a34a;
    --ink: #0e1626;
    --ink-2: #1c2940;
    --muted: #5d6c81;
    --muted-2: #8794a8;
    --bg: #f5f7fb;
    --surface: #ffffff;
    --border: #e3e9f2;
    --border-strong: #c9d5e5;

    /* 流式字号 */
    --fs-xs: clamp(.74rem, .71rem + .15vw, .8rem);
    --fs-sm: clamp(.85rem, .82rem + .15vw, .92rem);
    --fs-base: clamp(.97rem, .94rem + .2vw, 1.04rem);
    --fs-md: clamp(1.05rem, 1rem + .3vw, 1.18rem);
    --fs-lg: clamp(1.25rem, 1.13rem + .6vw, 1.55rem);
    --fs-xl: clamp(1.5rem, 1.28rem + 1.1vw, 2.1rem);
    --fs-2xl: clamp(1.95rem, 1.4rem + 2.4vw, 3.3rem);

    /* 空间与形状 */
    --radius-sm: 9px;
    --radius: 13px;
    --radius-lg: 18px;
    --shadow-sm: 0 1px 2px rgba(14, 22, 38, .05);
    --shadow: 0 1px 2px rgba(14, 22, 38, .05), 0 12px 32px -10px rgba(14, 22, 38, .12);
    --shadow-lg: 0 2px 6px rgba(14, 22, 38, .06), 0 24px 54px -14px rgba(8, 55, 103, .22);
    --container: 1240px;
    --header-h: 66px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--header-h) + 16px); }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial,
        "Noto Sans", "Noto Sans Arabic", "Noto Sans SC", sans-serif;
    font-size: var(--fs-base);
    line-height: 1.65;
    color: var(--ink);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color .16s ease; }
a:hover { color: var(--primary-dark); }

h1, h2, h3, h4 { line-height: 1.18; margin: 0 0 .5em; font-weight: 780; letter-spacing: -.018em; color: var(--ink); }
h1 { font-size: var(--fs-2xl); }
h2 { font-size: var(--fs-xl); }
h3 { font-size: var(--fs-md); }
p { margin: 0 0 1em; }

:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
::selection { background: var(--primary-100); }

/* ---------- 滚动入场动效 ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s cubic-bezier(.16, .68, .3, 1); }
.reveal.reveal-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* ---------- 布局 ---------- */
.container { max-width: var(--container); margin: 0 auto; padding: 0 clamp(16px, 3vw, 26px); }
.container-narrow { max-width: 840px; }
.site-main { min-height: 60vh; }
.section { padding: clamp(52px, 7vw, 96px) 0; }
.section--alt { background: var(--surface); border-block: 1px solid var(--border); }

.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 18px; margin-bottom: clamp(24px, 3.5vw, 40px); flex-wrap: wrap; }
.section-head h2 { margin: 0; }
.section-eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: var(--fs-xs); font-weight: 800; letter-spacing: .14em;
    text-transform: uppercase; color: var(--primary); margin-bottom: 10px;
}
.section-eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--accent); border-radius: 2px; }
.section-sub { color: var(--muted); font-size: var(--fs-md); max-width: 640px; margin: 8px 0 0; }
.section-more { font-weight: 650; white-space: nowrap; font-size: var(--fs-sm); display: inline-flex; align-items: center; gap: 5px; }
.section-more:hover { gap: 9px; }
.section-count { color: var(--muted); font-size: var(--fs-sm); }

/* ---------- 页头横幅（列表页） ---------- */
.page-head {
    background:
        radial-gradient(720px 300px at 85% -30%, rgba(240, 167, 20, .16), transparent 60%),
        linear-gradient(140deg, var(--primary) 0%, var(--primary-dark) 60%, var(--primary-deep) 100%);
    color: #fff; padding: clamp(34px, 5vw, 58px) 0;
}
.page-head h1 { color: #fff; margin: 0 0 8px; font-size: var(--fs-xl); }
.page-head p { color: #c6d7ec; margin: 0; font-size: var(--fs-sm); }
.page-head .breadcrumb, .page-head .breadcrumb a { color: #b3c6dd; }

/* ---------- 顶栏 & 导航 ---------- */
.topbar { background: var(--primary-deep); color: #b9cbe0; font-size: var(--fs-xs); border-bottom: 1px solid rgba(255,255,255,.06); }
.topbar-inner { display: flex; justify-content: space-between; align-items: center; padding-block: 7px; gap: 12px; }
.topbar-contact { display: flex; gap: 12px; align-items: center; }
.topbar-sep { opacity: .45; }

.lang-switch { display: flex; gap: 2px; align-items: center; }
.lang-current { color: #fff; font-weight: 750; padding: 3px 9px; border-radius: 7px; background: rgba(255, 255, 255, .16); }
.lang-link { color: #b9cbe0; padding: 3px 9px; border-radius: 7px; min-height: 26px; display: inline-flex; align-items: center; }
.lang-link:hover { color: #fff; background: rgba(255, 255, 255, .12); }

.navbar {
    background: rgba(255, 255, 255, .94);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 50;
    transition: box-shadow .25s ease;
}
.navbar.navbar--scrolled { box-shadow: 0 6px 24px -12px rgba(14, 22, 38, .25); }
.navbar-inner { display: flex; align-items: center; gap: 24px; padding-block: 13px; min-height: var(--header-h); }

.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 800; font-size: var(--fs-md); letter-spacing: -.01em; }
.brand-mark {
    background: linear-gradient(140deg, var(--primary) 10%, var(--primary-deep) 90%);
    color: #fff; padding: 5px 10px; border-radius: 9px; font-size: var(--fs-xs);
    letter-spacing: .06em; box-shadow: inset 0 1px 0 rgba(255, 255, 255, .28), 0 4px 10px -3px rgba(13, 74, 143, .5);
}
.brand-name { white-space: nowrap; }

.nav { display: flex; gap: 4px; margin-inline-start: auto; }
.nav a {
    color: var(--ink-2); font-weight: 580; padding: 8px 14px; border-radius: 10px;
    transition: all .16s ease; font-size: var(--fs-sm);
}
.nav a:hover { color: var(--primary); background: var(--primary-soft); }
.nav a[aria-current="page"] { color: var(--primary); background: var(--primary-soft); font-weight: 700; }

.nav-cta { white-space: nowrap; box-shadow: 0 6px 18px -5px rgba(13, 74, 143, .55); }
.nav-toggle {
    display: none; background: var(--surface); border: 1px solid var(--border-strong);
    border-radius: 10px; font-size: 1.15rem; padding: 6px 12px; cursor: pointer;
    min-width: 44px; min-height: 44px; color: var(--ink); line-height: 1;
}

.basket-link {
    position: relative; display: inline-flex; align-items: center; justify-content: center;
    width: 44px; height: 44px; font-size: 1.2rem; border-radius: 11px;
    border: 1px solid var(--border); background: var(--surface);
}
.basket-link:hover { border-color: var(--primary); background: var(--primary-soft); }
.basket-count {
    position: absolute; top: -7px; inset-inline-end: -7px;
    background: var(--accent); color: var(--ink); font-size: .68rem; font-weight: 800;
    min-width: 19px; height: 19px; border-radius: 999px;
    display: inline-flex; align-items: center; justify-content: center; padding: 0 5px;
    box-shadow: 0 2px 6px rgba(240, 167, 20, .5);
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 11px 24px; border-radius: 11px; border: 1px solid transparent;
    font-weight: 680; font-size: var(--fs-sm); cursor: pointer;
    transition: all .18s cubic-bezier(.3, .7, .4, 1); text-align: center; line-height: 1.3;
}
.btn-lg { padding: 15px 32px; font-size: var(--fs-base); border-radius: 13px; }
.btn-sm { padding: 7px 14px; font-size: var(--fs-xs); border-radius: 9px; }
.btn-primary {
    background: linear-gradient(180deg, #145ca9, var(--primary) 52%, var(--primary-dark));
    color: #fff;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .25), 0 8px 20px -6px rgba(13, 74, 143, .6);
}
.btn-primary:hover { filter: brightness(1.09); color: #fff; transform: translateY(-2px); box-shadow: 0 12px 26px -6px rgba(13, 74, 143, .65); }
.btn-ghost { background: transparent; border-color: var(--border-strong); color: var(--ink); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-soft); }
.btn-invert { background: #fff; color: var(--primary-dark); box-shadow: var(--shadow-lg); }
.btn-invert:hover { background: var(--accent); color: var(--ink); transform: translateY(-2px); }
.btn:active { transform: translateY(0) scale(.985); }

/* ---------- Hero v3 ---------- */
.hero {
    position: relative;
    min-height: clamp(540px, 74vh, 780px);
    display: flex; align-items: center;
    background:
        radial-gradient(1100px 520px at 88% -12%, rgba(240, 167, 20, .15), transparent 62%),
        radial-gradient(820px 560px at 4% 112%, rgba(64, 140, 255, .2), transparent 58%),
        linear-gradient(152deg, #0e55a4 0%, var(--primary-dark) 48%, var(--primary-deep) 100%);
    color: #fff; padding: clamp(64px, 9vw, 120px) 0;
    overflow: hidden;
}
/* 网格肌理 */
.hero::before {
    content: ""; position: absolute; inset: 0; pointer-events: none;
    background-image:
        linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px);
    background-size: 46px 46px;
    mask-image: radial-gradient(860px 540px at 72% 18%, #000 25%, transparent 78%);
    -webkit-mask-image: radial-gradient(860px 540px at 72% 18%, #000 25%, transparent 78%);
}
/* 底部光带 */
.hero::after {
    content: ""; position: absolute; inset-inline: 0; bottom: 0; height: 140px; pointer-events: none;
    background: linear-gradient(180deg, transparent, rgba(5, 31, 61, .55));
}
.hero .container { position: relative; z-index: 1; }

.hero-eyebrow {
    display: inline-flex; align-items: center; gap: 9px;
    background: rgba(255, 255, 255, .09); border: 1px solid rgba(255, 255, 255, .22);
    color: #dbe8f7; font-size: var(--fs-xs); font-weight: 680; letter-spacing: .06em;
    padding: 7px 16px; border-radius: 999px; margin-bottom: 24px;
    backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
}
.hero-eyebrow::before { content: "✦"; color: var(--accent); }
.hero h1 { color: #fff; max-width: 780px; font-size: var(--fs-2xl); margin-bottom: 20px; }
.hero h1 em { font-style: normal; position: relative; color: #ffce6b; white-space: nowrap; }
.hero p { max-width: 660px; color: #c9daf0; font-size: var(--fs-md); margin-bottom: 32px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero .btn-ghost { color: #fff; border-color: rgba(255, 255, 255, .45); backdrop-filter: blur(4px); }
.hero .btn-ghost:hover { border-color: #fff; background: rgba(255, 255, 255, .1); }

/* hero 搜索 */
.hero-search { display: flex; gap: 10px; max-width: 580px; margin-bottom: 18px; }
.hero-search input {
    flex: 1; min-height: 52px; padding: 12px 18px;
    border: 1px solid rgba(255, 255, 255, .32); border-radius: 13px;
    background: rgba(255, 255, 255, .1); color: #fff; font: inherit;
    backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
}
.hero-search input::placeholder { color: #a9c2de; }
.hero-search input:focus { outline: none; border-color: rgba(255, 255, 255, .7); background: rgba(255, 255, 255, .17); }
.hero-search__btn { border-color: rgba(255, 255, 255, .45); white-space: nowrap; flex-shrink: 0; min-height: 52px; }

/* hero 热门搜索词 */
.hero-hot { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; }
.hero-hot__label { color: #9fb8d6; font-size: var(--fs-xs); font-weight: 680; }
.hero-hot__link {
    color: #dbe8f7; font-size: var(--fs-xs); padding: 4px 13px; border-radius: 999px;
    background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .18);
    transition: all .15s ease;
}
.hero-hot__link:hover { color: #fff; background: rgba(240, 167, 20, .22); border-color: rgba(240, 167, 20, .5); }

/* 认证徽章 */
.hero-certs { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 26px; }
.hero-cert {
    display: inline-flex; align-items: center; gap: 7px;
    font-size: var(--fs-xs); font-weight: 680; color: #dbe8f7;
    background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .2);
    padding: 7px 14px; border-radius: 999px; letter-spacing: .02em;
}
.hero-cert::before { content: "✔"; color: var(--accent); font-weight: 800; }

/* 数据统计条：玻璃卡片 + 分隔线 */
.hero-stats {
    display: grid; grid-template-columns: repeat(4, 1fr);
    margin-top: clamp(34px, 5vw, 56px);
    background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .14);
    border-radius: var(--radius-lg); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
    overflow: hidden;
}
.hero-stat { padding: 22px 26px; position: relative; }
.hero-stat + .hero-stat::before {
    content: ""; position: absolute; inset-inline-start: 0; top: 22%; height: 56%; width: 1px;
    background: rgba(255, 255, 255, .16);
}
.hero-stat__num { font-size: clamp(1.5rem, 1.2rem + 1.5vw, 2.3rem); font-weight: 800; color: #fff; letter-spacing: -.02em; line-height: 1.05; }
.hero-stat__num span { color: var(--accent); }
.hero-stat__label { color: #a5bcd6; font-size: var(--fs-xs); margin-top: 4px; }

/* ---------- 保障条 ---------- */
.guarantees { background: var(--surface); border-bottom: 1px solid var(--border); }
.guarantees-row {
    display: flex; flex-wrap: wrap; gap: 12px 36px; justify-content: center;
    padding-block: 17px; font-size: var(--fs-sm); font-weight: 650; color: var(--ink-2);
}
.guarantee { display: inline-flex; align-items: center; gap: 9px; }
.guarantee::before {
    content: "✓"; display: inline-grid; place-items: center;
    width: 19px; height: 19px; border-radius: 999px;
    background: var(--primary-soft); color: var(--primary); font-size: .68rem; font-weight: 800;
}

/* ---------- 特性 ---------- */
.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.feature {
    position: relative; background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 26px 24px;
    transition: all .2s cubic-bezier(.3, .7, .4, 1); overflow: hidden;
}
.feature::after {
    content: ""; position: absolute; inset-inline-start: 0; top: 0; width: 100%; height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    opacity: 0; transition: opacity .2s ease;
}
.feature:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: var(--primary-100); }
.feature:hover::after { opacity: 1; }
.feature__icon {
    width: 50px; height: 50px; border-radius: 13px; display: grid; place-items: center;
    background: linear-gradient(140deg, var(--primary-soft), var(--primary-100));
    color: var(--primary); margin-bottom: 16px;
}
.feature__icon svg { width: 25px; height: 25px; }
.feature h3 { margin-bottom: 6px; font-size: var(--fs-base); }
.feature p { color: var(--muted); font-size: var(--fs-sm); margin: 0; }

/* ---------- 网格 ---------- */
.grid { display: grid; gap: clamp(16px, 2.2vw, 22px); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- 产品卡片 v3 ---------- */
.product-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
    overflow: hidden; display: flex; flex-direction: column;
    transition: all .2s cubic-bezier(.3, .7, .4, 1); color: var(--ink); box-shadow: var(--shadow-sm);
}
.product-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: var(--primary-100); }
.product-card__media { aspect-ratio: 4/3; background: linear-gradient(160deg, var(--primary-soft), #d5e5f7); position: relative; overflow: hidden; }
.product-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s cubic-bezier(.2, .6, .3, 1); }
.product-card:hover .product-card__media img { transform: scale(1.06); }
.product-card__placeholder {
    position: absolute; inset: 0; display: grid; place-items: center;
    font-size: 3.2rem; font-weight: 800; color: #a9c5e6;
    transition: transform .45s ease;
}
.product-card:hover .product-card__placeholder { transform: scale(1.06); }
.product-card__body { padding: 18px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.product-card__category {
    font-size: var(--fs-xs); text-transform: uppercase; letter-spacing: .08em;
    color: var(--primary); font-weight: 750;
}
.product-card__title { font-size: var(--fs-base); margin: 0; font-weight: 700; }
.product-card:hover .product-card__title { color: var(--primary); }
.product-card__meta { margin-top: auto; padding-top: 8px; display: flex; flex-direction: column; gap: 3px; font-size: var(--fs-sm); color: var(--muted); }
.product-card__price { color: var(--primary-dark); font-weight: 750; font-size: var(--fs-base); }

.category-card {
    position: relative; background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 26px 24px; color: var(--ink);
    transition: all .2s cubic-bezier(.3, .7, .4, 1); overflow: hidden; box-shadow: var(--shadow-sm);
}
.category-card::before {
    content: ""; position: absolute; inset-inline-start: 0; top: 0; height: 100%; width: 3px;
    background: linear-gradient(180deg, var(--primary), var(--accent));
    transform: scaleY(0); transform-origin: top; transition: transform .25s ease;
}
.category-card:hover::before { transform: scaleY(1); }
.category-card::after {
    content: "→"; position: absolute; inset-inline-end: 18px; top: 24px;
    color: var(--primary); font-weight: 700; opacity: 0; transition: all .2s ease;
}
.category-card:hover { border-color: var(--primary); box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.category-card:hover::after { opacity: 1; inset-inline-end: 13px; }
.category-card h3 { margin: 0 0 6px; }
.category-card__count { color: var(--muted); font-size: var(--fs-sm); }

.post-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
    padding: 24px; color: var(--ink); display: flex; flex-direction: column; gap: 8px;
    transition: all .2s cubic-bezier(.3, .7, .4, 1); box-shadow: var(--shadow-sm);
}
.post-card:hover { box-shadow: var(--shadow-lg); border-color: var(--border-strong); transform: translateY(-3px); }
.post-card__date { color: var(--muted-2); font-size: var(--fs-xs); font-weight: 620; }
.post-card h3 { margin: 0; font-size: var(--fs-md); }
.post-card p { color: var(--muted); font-size: var(--fs-sm); margin: 0; }
.post-card__more { margin-top: auto; padding-top: 6px; font-weight: 650; font-size: var(--fs-sm); color: var(--primary); }

/* ---------- 面包屑 ---------- */
.breadcrumb { color: var(--muted); font-size: var(--fs-sm); margin-bottom: 18px; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--primary); }

/* ---------- 产品详情 ---------- */
.product-layout { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.3fr) minmax(300px, .95fr); gap: clamp(22px, 3vw, 34px); align-items: start; }
.product-gallery { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); }
.product-gallery img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.product-gallery__placeholder {
    aspect-ratio: 4/3; display: grid; place-items: center;
    font-size: 4.5rem; font-weight: 800; color: #a9c5e6;
    background: linear-gradient(160deg, var(--primary-soft), #d5e5f7);
}
.product-summary { font-size: var(--fs-md); color: var(--muted); }
.product-subhead { margin-top: 24px; font-size: var(--fs-base); }
.product-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0; }
.chip {
    background: var(--surface); border: 1px solid var(--border);
    padding: 6px 13px; border-radius: 999px; font-size: var(--fs-sm); color: var(--ink-2);
}
.chip-price { background: var(--primary-soft); border-color: var(--primary-100); color: var(--primary-dark); font-weight: 750; }
.chip-link { display: inline-flex; gap: 5px; align-items: center; }
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }

.spec-table {
    width: 100%; border-collapse: collapse; background: var(--surface);
    border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
    font-size: var(--fs-sm); box-shadow: var(--shadow-sm);
}
.spec-table th, .spec-table td { text-align: start; padding: 11px 15px; border-bottom: 1px solid var(--border); }
.spec-table tr:last-child th, .spec-table tr:last-child td { border-bottom: 0; }
.spec-table th { background: var(--bg); width: 40%; font-weight: 640; }

.product-description { margin-top: 24px; }
.product-inquiry {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
    padding: 24px; position: sticky; top: calc(var(--header-h) + 16px); box-shadow: var(--shadow-lg);
}
.product-inquiry__hint { color: var(--muted); font-size: var(--fs-sm); }

/* ---------- 分类页 ---------- */
.category-layout { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: clamp(20px, 3vw, 30px); align-items: start; }
.facet-panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 20px; position: sticky; top: calc(var(--header-h) + 16px); }
.facet-panel form { display: flex; flex-direction: column; gap: 10px; }
.facet-panel h3 { font-size: var(--fs-base); }
.category-description { margin-top: 32px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 24px; }
.category-main { min-width: 0; }

/* ---------- 表单 ---------- */
.form-note { color: var(--muted); font-size: var(--fs-xs); }
.hp-field { position: absolute; inset-inline-start: -9999px; height: 0; overflow: hidden; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 14px; }
.form-field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 12px; }
.form-field label { font-size: var(--fs-sm); font-weight: 640; color: var(--ink-2); }
.form-field input, .form-field textarea, .form-field select {
    padding: 11px 13px; border: 1px solid var(--border-strong); border-radius: 10px;
    font: inherit; background: #fff; color: var(--ink); min-height: 44px;
    transition: border-color .15s ease, box-shadow .15s ease;
}
.form-field textarea { min-height: unset; resize: vertical; }
.form-field input:focus, .form-field textarea:focus, .form-field select:focus {
    outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-100);
}
.form-status { padding: 11px 15px; border-radius: 10px; font-size: var(--fs-sm); margin-top: 12px; }
.form-status--success { background: #e9f9f0; color: #116a3c; border: 1px solid #bfe8d0; }
.form-status--error { background: #fdefef; color: #9d2f2f; border: 1px solid #f2caca; }
.inquiry-form button[type=submit]:disabled { opacity: .6; cursor: wait; }

.search-bar { display: flex; gap: 8px; max-width: 540px; margin-bottom: 26px; }
.search-bar input {
    flex: 1; padding: 12px 15px; border: 1px solid var(--border-strong); border-radius: 11px;
    font: inherit; background: var(--surface); min-height: 46px;
}
.search-bar input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-100); }

/* ---------- 文章 ---------- */
.article { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: clamp(24px, 4vw, 40px); margin-bottom: 24px; box-shadow: var(--shadow-sm); }
.article-meta { color: var(--muted-2); font-size: var(--fs-sm); margin-bottom: 18px; }
.article-excerpt { font-size: var(--fs-md); color: var(--muted); border-inline-start: 3px solid var(--accent); padding-inline-start: 15px; }
.article-body h2, .article-body h3 { margin-top: 1.5em; }
.article-body img { border-radius: var(--radius); margin: 1em 0; }
.article-body a { text-decoration: underline; text-underline-offset: 3px; }

/* ---------- 联系页 ---------- */
.contact-layout { display: grid; grid-template-columns: 1fr 1.4fr; gap: clamp(20px, 3vw, 30px); align-items: start; }
.contact-info, .contact-form { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: clamp(20px, 3vw, 28px); }
.footer-links { list-style: none; padding: 0; margin: 0 0 1em; display: flex; flex-direction: column; gap: 9px; }

/* ---------- FAQ ---------- */
.faq-list { display: flex; flex-direction: column; gap: 10px; }
.faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.faq-item summary {
    cursor: pointer; padding: 15px 20px; font-weight: 650; font-size: var(--fs-base);
    list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 12px;
    color: var(--ink-2); min-height: 48px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; color: var(--primary); font-weight: 700; font-size: 1.2rem; transition: transform .18s ease; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item[open] summary { border-bottom: 1px solid var(--border); }
.faq-item__a { padding: 14px 20px 16px; color: var(--muted); font-size: var(--fs-sm); margin: 0; }

/* ---------- 分页 ---------- */
.pagination { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 30px; }
.pagination-item {
    min-width: 42px; height: 42px; display: inline-flex; align-items: center; justify-content: center;
    border: 1px solid var(--border); border-radius: 10px; background: var(--surface);
    color: var(--ink); padding: 0 11px; font-size: var(--fs-sm);
}
.pagination-item:hover { border-color: var(--primary); color: var(--primary); }
.pagination-item.is-current { background: var(--primary); border-color: var(--primary); color: #fff; font-weight: 700; }
.pagination-item.is-disabled { opacity: .45; pointer-events: none; }

.empty-state { text-align: center; color: var(--muted); padding: 52px 0; }

/* ---------- 询盘篮 ---------- */
.basket-list { display: flex; flex-direction: column; gap: 10px; margin-bottom: 28px; }
.basket-row {
    display: flex; align-items: center; justify-content: space-between; gap: 16px;
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 18px;
}
.basket-row__info { display: flex; flex-direction: column; gap: 2px; font-weight: 620; }
.basket-row__info small { color: var(--muted); font-weight: 400; }
.basket-remove {
    border: none; background: none; color: var(--muted); font-size: 1rem; cursor: pointer;
    padding: 8px 11px; border-radius: 9px; min-width: 38px; min-height: 38px;
}
.basket-remove:hover { background: #fdefef; color: #9d2f2f; }
.basket-form-wrap { margin-top: 8px; }

.add-basket-btn {
    margin-top: 10px; align-self: flex-start;
    padding: 7px 14px; font-size: var(--fs-xs); font-weight: 700;
    border: 1px solid var(--border-strong); border-radius: 999px; background: var(--bg);
    color: var(--primary); cursor: pointer; transition: all .15s ease; min-height: 32px;
}
.add-basket-btn:hover { border-color: var(--primary); background: var(--primary-soft); }
.add-basket-btn.is-added { background: var(--primary); border-color: var(--primary); color: #fff; }
.add-basket-btn-lg { width: 100%; margin-bottom: 14px; min-height: 44px; }
.add-basket-btn-lg.is-added { background: var(--primary-soft); color: var(--primary-dark); border-color: var(--primary); }

/* ---------- CTA band ---------- */
.cta-band {
    position: relative; text-align: center; padding: clamp(56px, 8vw, 96px) 0;
    background:
        radial-gradient(700px 340px at 50% 130%, rgba(240, 167, 20, .2), transparent 62%),
        linear-gradient(150deg, var(--primary-dark), var(--primary-deep));
    color: #fff; overflow: hidden;
}
.cta-band::before {
    content: ""; position: absolute; inset: 0; pointer-events: none;
    background-image:
        linear-gradient(rgba(255, 255, 255, .04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .04) 1px, transparent 1px);
    background-size: 46px 46px;
    mask-image: radial-gradient(600px 300px at 50% 0%, #000, transparent 80%);
    -webkit-mask-image: radial-gradient(600px 300px at 50% 0%, #000, transparent 80%);
}
.cta-band .container { position: relative; }
.cta-band h2 { color: #fff; font-size: var(--fs-xl); }
.cta-band p { color: #b9cbe0; }

/* ---------- Footer ---------- */
.site-footer { background: var(--primary-deep); color: #a7bad2; margin-top: clamp(40px, 6vw, 64px); position: relative; }
.site-footer::before {
    content: ""; position: absolute; top: 0; inset-inline: 0; height: 3px;
    background: linear-gradient(90deg, var(--accent), rgba(240, 167, 20, .1) 55%, transparent);
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: clamp(26px, 4vw, 44px); padding-block: clamp(38px, 5vw, 56px); }
.site-footer .brand { color: #fff; }
.site-footer h4 { color: #fff; font-size: var(--fs-sm); text-transform: uppercase; letter-spacing: .09em; }
.footer-links a { color: #a7bad2; }
.footer-links a:hover { color: #fff; }
.footer-about { font-size: var(--fs-sm); max-width: 400px; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .09); padding-block: 16px; font-size: var(--fs-xs); }

/* ---------- 行业芯片 ---------- */
.industries { display: flex; flex-wrap: wrap; gap: 10px; }
.industry-chip {
    display: inline-flex; align-items: center; gap: 9px;
    background: var(--surface); border: 1px solid var(--border);
    padding: 12px 21px; border-radius: 999px; color: var(--ink-2);
    font-weight: 640; font-size: var(--fs-sm); transition: all .16s ease;
}
.industry-chip::before { content: ""; width: 7px; height: 7px; border-radius: 999px; background: var(--accent); }
.industry-chip:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-soft); transform: translateY(-2px); box-shadow: var(--shadow-sm); }

/* ---------- 表单安心话术 ---------- */
.form-reassure { color: var(--muted-2); font-size: var(--fs-xs); margin: 10px 0 0; }

/* ---------- 导航分类下拉 ---------- */
.nav-item { position: relative; }
.nav-item > a { display: inline-flex; align-items: center; gap: 4px; }
.nav-caret {
    display: block; width: 11px; height: 11px; flex-shrink: 0;
    opacity: .55; transition: transform .18s ease, opacity .15s ease;
}
.nav-item:hover .nav-caret, .nav-item:focus-within .nav-caret {
    transform: rotate(180deg); opacity: 1;
}
.nav-dropdown {
    position: absolute; top: 100%; inset-inline-start: 0;
    min-width: 280px; background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); box-shadow: var(--shadow-lg);
    padding: 8px; margin-top: 10px; display: none; flex-direction: column; gap: 2px; z-index: 60;
}
.nav-dropdown::before { content: ""; position: absolute; top: -12px; inset-inline: 0; height: 12px; }
.nav-item:hover .nav-dropdown, .nav-item:focus-within .nav-dropdown { display: flex; }

.nav-dropdown__label {
    font-size: .68rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase;
    color: var(--muted-2); padding: 4px 13px 6px;
}
.nav-dropdown a {
    display: flex; justify-content: space-between; align-items: center; gap: 14px;
    padding: 10px 13px; border-radius: 9px; color: var(--ink-2); font-size: var(--fs-sm);
    font-weight: 580; transition: all .14s ease;
}
.nav-dropdown__count {
    font-size: .7rem; font-weight: 750; color: var(--primary-dark);
    background: var(--primary-soft); padding: 2px 8px; border-radius: 999px;
    font-variant-numeric: tabular-nums;
}
.nav-dropdown a:hover { background: var(--primary-soft); color: var(--primary); }
.nav-dropdown__all {
    border-top: 1px solid var(--border); margin-top: 4px; padding-top: 11px !important;
    color: var(--primary) !important; font-weight: 700;
}

/* ---------- 采购流程 ---------- */
.process {
    list-style: none; margin: 0; padding: 0;
    display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px;
    counter-reset: step;
}
.process-step {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
    padding: 22px; position: relative; transition: all .2s cubic-bezier(.3, .7, .4, 1);
}
.process-step:hover { box-shadow: var(--shadow-lg); border-color: var(--primary-100); transform: translateY(-3px); }
.process-step__num {
    display: inline-grid; place-items: center; width: 36px; height: 36px;
    border-radius: 11px; color: #fff; font-weight: 800; font-size: .95rem; margin-bottom: 13px;
    background: linear-gradient(140deg, var(--primary), var(--primary-dark));
    box-shadow: 0 5px 12px -3px rgba(13, 74, 143, .5);
}
.process-step h3 { font-size: var(--fs-base); margin-bottom: 5px; }
.process-step p { color: var(--muted); font-size: var(--fs-xs); margin: 0; }

/* ---------- 移动端 CTA 条 ---------- */
.mobile-cta { display: none; }

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* ---------- 平板 ---------- */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .features { grid-template-columns: repeat(2, 1fr); }
    .product-layout { grid-template-columns: 1fr 1fr; }
    .product-inquiry { grid-column: 1 / -1; position: static; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
    .hero-stat + .hero-stat::before { display: none; }
    .process { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- 手机 ---------- */
@media (max-width: 768px) {
    .nav {
        display: none; position: absolute; top: 100%; inset-inline: 0;
        background: var(--surface); flex-direction: column; padding: 14px 16px; gap: 4px;
        border-bottom: 1px solid var(--border); box-shadow: var(--shadow-lg);
    }
    .nav.open { display: flex; }
    .nav a { padding: 12px 14px; border-radius: 10px; }
    .nav-toggle { display: inline-flex; align-items: center; justify-content: center; margin-inline-start: auto; }
    .nav { margin-inline-start: 0; }
    .nav-cta { display: none; }
    .nav-dropdown { display: none !important; }

    .grid-3, .grid-4, .features { grid-template-columns: repeat(2, 1fr); }
    .product-layout, .category-layout, .contact-layout { grid-template-columns: 1fr; }
    .facet-panel { position: static; }
    .footer-grid { grid-template-columns: 1fr; gap: 26px; }
    .topbar-contact { display: none; }
    .topbar-inner { justify-content: center; }
    .form-grid { grid-template-columns: 1fr; }
    .hero-actions .btn { flex: 1 1 auto; }
    .process { grid-template-columns: 1fr; }

    .mobile-cta {
        display: flex; gap: 10px; position: fixed; bottom: 0; inset-inline: 0; z-index: 45;
        padding: 10px 14px calc(10px + env(safe-area-inset-bottom, 0px));
        background: rgba(255, 255, 255, .97); backdrop-filter: blur(10px);
        border-top: 1px solid var(--border); box-shadow: 0 -4px 16px rgba(15, 23, 42, .08);
    }
    .mobile-cta__btn {
        flex: 1; text-align: center; padding: 13px 10px; border-radius: 11px;
        border: 1px solid var(--border-strong); color: var(--ink); font-weight: 700; font-size: var(--fs-sm);
        min-height: 48px; display: inline-flex; align-items: center; justify-content: center;
    }
    .mobile-cta__btn--primary {
        background: linear-gradient(180deg, #145ca9, var(--primary-dark)); border-color: var(--primary-dark); color: #fff;
        box-shadow: 0 4px 14px -4px rgba(13, 74, 143, .55);
    }
    body { padding-bottom: 78px; }
}

/* ---------- 小屏手机 ---------- */
@media (max-width: 480px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
    .section { padding: 40px 0; }
    .hero { padding: 48px 0 60px; min-height: unset; }
    .product-card__body, .feature, .post-card, .category-card { padding: 16px; }
}

/* ===== 首页双栏 hero：左文案 + 右询盘表单卡（纯线索站第一转化点） ===== */
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: start; }
.hero-card {
    background: rgba(255, 255, 255, .97); border-radius: var(--radius-lg);
    padding: 26px 24px; color: var(--ink);
    box-shadow: 0 24px 60px rgba(4, 20, 43, .45);
}
.hero-card > h2 { font-size: var(--fs-lg); margin: 0 0 14px; letter-spacing: -.01em; }
.hero-card .form-note { margin-bottom: 10px; }

/* 首页行业入口卡（图标 + 名称 + 箭头，链接到行业落地页） */
.ind-card {
    display: flex; align-items: center; gap: 14px;
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
    padding: 18px 18px; text-decoration: none; color: var(--ink);
    transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.ind-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); border-color: var(--brand-300, #c8b273); }
.ind-card__icon {
    flex-shrink: 0; width: 44px; height: 44px; border-radius: 12px;
    display: grid; place-items: center;
    background: rgba(37, 84, 155, .08); color: var(--brand, #25549b);
}
.ind-card__icon svg { width: 22px; height: 22px; }
.ind-card h3 { font-size: var(--fs-sm); font-weight: 700; margin: 0; line-height: 1.35; flex: 1; }
.ind-card__arrow { color: var(--muted); font-weight: 600; transition: transform .18s ease; }
.ind-card:hover .ind-card__arrow { transform: translateX(3px); color: var(--brand, #25549b); }

@media (max-width: 980px) {
    .hero-grid { grid-template-columns: 1fr; gap: 28px; }
}

/* 内容页窄容器 + 询盘表单卡（服务页/行业页复用） */
.container--narrow { max-width: 760px; }
.panel-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
    padding: 26px 24px; box-shadow: var(--shadow-sm);
}

/* 行业索引尾段 + 联系页说明段（内容深度区块） */
.industries-footer-note {
    margin-top: 32px; padding: 20px 24px;
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
    color: var(--muted); font-size: var(--fs-sm); line-height: 1.7;
}
.industries-footer-note p { margin: 0; }
.contact-how { margin-top: 20px; }
.contact-how h3 { font-size: var(--fs-base); margin: 16px 0 6px; }
.contact-how p { color: var(--muted); font-size: var(--fs-sm); line-height: 1.7; margin: 0; }

/* 法律页 + 404 + footer 法律链接 */
.legal-body h2 { font-size: var(--fs-lg); margin: 28px 0 8px; }
.legal-body h2:first-child { margin-top: 0; }
.legal-body p { color: var(--muted); line-height: 1.75; margin: 0 0 6px; }
.legal-contact { margin-top: 28px; font-weight: 600; }
.footer-bottom-inner { display: flex; flex-wrap: wrap; gap: 8px 18px; align-items: center; justify-content: space-between; }
.footer-legal a { color: inherit; text-decoration: underline; text-underline-offset: 3px; margin-left: 14px; opacity: .85; }
.footer-legal a:hover { opacity: 1; }
.section--tall { padding: 80px 0; }
.notfound { text-align: center; }
.notfound__code { font-size: 88px; font-weight: 800; line-height: 1; margin: 0 0 12px; color: var(--brand, #25549b); opacity: .18; }
.notfound h1 { margin-bottom: 8px; }
.notfound > p { color: var(--muted); max-width: 520px; margin: 0 auto; }
.btn-ghost-dark { border: 1px solid var(--border); color: var(--ink); background: transparent; }
.btn-ghost-dark:hover { background: var(--surface); }