/* ============================================================
   site.css — EverJoy Moto 站点视觉方案（powersports B2B）
   锁骨架放皮肤：骨架 class 名由契约锁定，视觉完全自主。
   三个锁：单一强调色 volt-lime / 圆角 8-12 两档 / 全站暗色主题
   ============================================================ */

/* ---------- 0. Tokens ---------- */
:root {
    --accent: #c8f542;            /* volt lime：唯一强调色 */
    --accent-dim: rgba(200, 245, 66, 0.14);
    --accent-ink: #14190a;        /* 强调色上的文字 */
    --lime: #c8f542;              /* SSR 视图别名 */
    --lime-ink: #14190a;

    --bg: #0f1214;                /* 页面底色（近黑石墨） */
    --paper: #ecefe6;             /* 主文字（暖白） */
    --paper-soft: rgba(236, 239, 230, 0.72);
    --muted: #9aa3a9;             /* 次级文字 */
    --ink-2: #171c1f;             /* 卡片/面板底 */
    --ink-3: #1e2428;             /* 更深一层底 */
    --line: #262d31;              /* 细分割线 */
    --line-strong: #3a4348;       /* 强分割线/描边 */

    --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-display: "Segoe UI", "Helvetica Neue", Arial, ui-sans-serif, system-ui, sans-serif;

    --radius-sm: 8px;
    --radius: 12px;
    --wrap-max: 1400px;
}

/* ---------- 1. Base ---------- */
html { color-scheme: dark; scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--paper);
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 {
    font-family: var(--font-display);
    line-height: 1.15;
    margin: 0 0 0.6em;
    color: var(--paper);
    letter-spacing: -0.01em;
}
p { margin: 0 0 1em; }
a { color: inherit; }
::selection { background: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
img { max-width: 100%; display: block; }

.wrap {
    max-width: var(--wrap-max);
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}
.icon { width: 1em; height: 1em; flex-shrink: 0; }
.sep { color: var(--muted); margin: 0 0.5rem; }

/* ---------- 2. Buttons ---------- */
.button, .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-height: 44px;
    padding: 0.7rem 1.6rem;
    border-radius: var(--radius-sm);
    border: 1.5px solid var(--accent);
    background: var(--accent);
    color: var(--accent-ink);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.button:hover, .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(200, 245, 66, 0.25);
}
.button:active, .btn:active { transform: translateY(0); box-shadow: none; }
.btn-primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn-ghost, .button.ghost {
    background: transparent;
    color: var(--paper);
    border-color: var(--line-strong);
}
.btn-ghost:hover, .button.ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: none;
}
.btn-sm { min-height: 40px; padding: 0.45rem 1.1rem; font-size: 0.85rem; }
.btn-block { display: flex; width: 100%; }

/* ---------- 3. 顶部信息条 + 阅读进度 ---------- */
.site-topbar {
    background: #0b0e10;
    border-bottom: 1px solid var(--line);
    color: var(--muted);
    padding: 0.4rem 0;
}
.site-topbar a { color: var(--muted); text-decoration: none; transition: color 0.2s; }
.site-topbar a:hover { color: var(--accent); }

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 100%;
    z-index: 70;
    background: linear-gradient(90deg, var(--accent), rgba(200, 245, 66, 0.25));
    transform-origin: left;
    transform: scaleX(0);
    pointer-events: none;
}

/* ---------- 4. 共享头部（契约骨架） ---------- */
.nav {
    position: sticky;
    top: 0;
    z-index: 60;
    background: rgba(15, 18, 20, 0.88);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
}
.skip {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 99;
    background: var(--accent);
    color: var(--accent-ink);
    padding: 0.6rem 1.2rem;
    border-radius: 0 0 var(--radius-sm) 0;
    font-weight: 700;
    text-decoration: none;
}
.skip:focus { left: 0; }
.nav-inner {
    display: flex;
    align-items: center;
    gap: 2rem;
    min-height: 72px;
}
.brand { display: inline-flex; align-items: center; gap: 0.6rem; text-decoration: none; }
.brand-logo { height: 42px; width: auto; }
.brand-name {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.15rem;
    letter-spacing: 0.02em;
    color: var(--paper);
}
.nav .links { display: flex; align-items: center; gap: 1.6rem; margin-left: auto; }
.nav .links > a, .nav .has-sub > button {
    appearance: none;
    background: none;
    border: 0;
    padding: 0.5rem 0;
    font-family: var(--font-sans);
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--paper-soft);
    text-decoration: none;
    cursor: pointer;
    position: relative;
    transition: color 0.2s ease;
}
.nav .links > a::after, .nav .has-sub > button::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    height: 2px;
    width: 100%;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.25s ease;
}
.nav .links > a:hover, .nav .has-sub > button:hover { color: var(--accent); }
.nav .links > a:hover::after, .nav .has-sub:hover > button::after, .nav .has-sub:focus-within > button::after { transform: scaleX(1); }
.is-static { pointer-events: none; color: var(--muted); }

.has-sub { position: relative; }
.sub-menu {
    position: absolute;
    top: calc(100% + 10px);
    left: 50%;
    transform: translate(-50%, 8px);
    min-width: 220px;
    background: var(--ink-2);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-sm);
    padding: 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
}
.has-sub:hover .sub-menu, .has-sub:focus-within .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, 0);
}
.sub-menu a {
    display: block;
    padding: 0.55rem 0.8rem;
    border-radius: 6px;
    font-size: 0.88rem;
    color: var(--paper-soft);
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
}
.sub-menu a:hover { background: var(--accent-dim); color: var(--accent); }

.nav-actions { display: flex; align-items: center; gap: 1rem; }
.nav-cta { min-height: 42px; padding: 0.5rem 1.3rem; font-size: 0.88rem; }
.locale-switcher {
    appearance: none;
    background: var(--ink-2);
    color: var(--paper-soft);
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    padding: 0.4rem 1rem;
    font-size: 0.82rem;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: border-color 0.2s;
}
.locale-switcher:hover { border-color: var(--accent); }

.mobile-menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    background: none;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-sm);
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    transition: border-color 0.2s;
}
.mobile-menu-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--paper);
    transition: background 0.2s;
}
.mobile-menu-toggle:hover { border-color: var(--accent); }
.mobile-menu-toggle:hover span { background: var(--accent); }

.mobile-menu {
    display: none;
    border-top: 1px solid var(--line);
    background: var(--bg);
    padding: 0.8rem 24px 1.2rem;
}
.mobile-menu[hidden] { display: none; }
.mobile-menu a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.6rem;
    padding: 0.85rem 0.2rem;
    border-bottom: 1px solid var(--line);
    color: var(--paper);
    font-weight: 600;
    text-decoration: none;
}
.mobile-menu a:last-child { border-bottom: 0; color: var(--accent); }
.mobile-menu .mobile-sub {
    padding-left: 1.2rem;
    font-weight: 400;
    font-size: 0.9rem;
    color: var(--paper-soft);
}
.mobile-menu .icon { color: var(--muted); }

/* ---------- 5. 共享尾部（契约骨架） ---------- */
.footer {
    margin-top: 96px;
    background: #0b0e10;
    border-top: 1px solid var(--line);
    padding: 64px 0 0;
    color: var(--muted);
    font-size: 0.9rem;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
    gap: 2.5rem;
    padding-bottom: 3rem;
}
.footer-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--paper);
    margin-bottom: 1rem;
    letter-spacing: 0.02em;
}
.footer-about { line-height: 1.75; }
.footer-links { display: flex; flex-direction: column; gap: 0.55rem; }
.footer-links a { color: var(--muted); text-decoration: none; transition: color 0.2s, transform 0.2s; display: inline-block; }
.footer-links a:hover { color: var(--accent); transform: translateX(3px); }
.footer-contact > div { display: flex; gap: 0.5rem; margin-bottom: 0.6rem; align-items: flex-start; }
.footer-contact span:first-child { color: var(--accent); font-size: 0.6rem; line-height: 2.2; }
.footer-contact a { color: var(--muted); text-decoration: none; }
.footer-contact a:hover { color: var(--accent); }
.footer-social { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1rem; }
.footer-social a {
    padding: 0.35rem 0.9rem;
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    font-size: 0.78rem;
    color: var(--muted);
    text-decoration: none;
    transition: color 0.2s, border-color 0.2s;
}
.footer-social a:hover { color: var(--accent); border-color: var(--accent); }
.footer-certs { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.2rem; }
.footer-certs span {
    border: 1px solid var(--line-strong);
    border-radius: 6px;
    padding: 0.25rem 0.7rem;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--paper-soft);
}
.footer-row {
    border-top: 1px solid var(--line);
    padding: 1.2rem 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    font-size: 0.82rem;
}
.footer-row a { color: var(--muted); text-decoration: none; }
.footer-row a:hover { color: var(--accent); }

/* ---------- 6. SSR 页面公共件（blog/产品/FAQ 宿主） ---------- */
.page-head { padding: 3.5rem 0 2rem; margin: 3.5rem 0 2rem; border-bottom: 1px solid var(--line); }
.page-head h1 { font-size: clamp(1.7rem, 3.5vw, 2.6rem); font-weight: 800; margin-bottom: 0.4rem; }
.page-head p { color: var(--muted); margin: 0; }
.page-head p strong { color: var(--accent); }
.breadcrumbs { font-size: 0.82rem; color: var(--muted); padding-top: 1rem; margin-bottom: 1rem; }
.breadcrumbs a { color: var(--muted); text-decoration: none; transition: color 0.2s; }
.breadcrumbs a:hover { color: var(--accent); }
.breadcrumbs [aria-current="page"] { color: var(--paper); }
.eyebrow {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.8rem;
}

.badge-row { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.pill {
    display: inline-block;
    padding: 0.45rem 1.2rem;
    border-radius: 999px;
    border: 1.5px solid var(--accent);
    background: var(--accent);
    color: var(--accent-ink);
    font-size: 0.86rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
}
.pill.neutral { background: transparent; border-color: var(--line-strong); color: var(--muted); }
.pill.neutral:hover { border-color: var(--accent); color: var(--accent); }

.cards { display: grid; gap: 1.4rem; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.card {
    display: flex;
    flex-direction: column;
    background: var(--ink-2);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    text-decoration: none;
    color: var(--paper);
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.card:hover {
    transform: translateY(-4px);
    border-color: var(--line-strong);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.4);
}
.card-media {
    position: relative;
    aspect-ratio: 4 / 3;
    background: var(--ink-3);
    overflow: hidden;
}
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.card:hover .card-media img { transform: scale(1.05); }
.chip {
    position: absolute;
    top: 0.8rem;
    left: 0.8rem;
    background: var(--accent);
    color: var(--accent-ink);
    border-radius: 6px;
    padding: 0.2rem 0.6rem;
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.08em;
}
.card-body { padding: 1.2rem 1.3rem 0.4rem; flex: 1; }
.card-body h3 { font-size: 1.02rem; margin: 0; line-height: 1.4; }
.card-body p { color: var(--muted); font-size: 0.86rem; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.badge {
    display: inline-block;
    border: 1px solid var(--line-strong);
    border-radius: 6px;
    padding: 0.18rem 0.6rem;
    font-size: 0.72rem;
    color: var(--muted);
    letter-spacing: 0.04em;
}
.card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.9rem 1.3rem 1.2rem;
    font-size: 0.8rem;
}
.card-meta .sn { color: var(--muted); }
.card-meta .go {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--accent);
    font-weight: 600;
}
.card-meta .go .icon { transition: transform 0.2s ease; }
.card:hover .card-meta .go .icon { transform: translateX(4px); }
.panel { background: var(--ink-2); border: 1px solid var(--line); border-radius: var(--radius); }

.cta-banner {
    background: linear-gradient(115deg, var(--ink-2) 55%, var(--accent-dim));
    border: 1px solid var(--line-strong);
    padding: 2.8rem 0;
}
.cta-banner h2 { font-size: 1.5rem; margin-bottom: 0.3rem; }
.cta-banner p { color: var(--muted); margin-bottom: 1.2rem; }
.cta-actions { display: flex; gap: 0.8rem; flex-wrap: wrap; }
.mid-cta { background: var(--ink-2); border: 1px solid var(--line-strong); }
.mid-cta-in { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; padding-top: 1.8rem; padding-bottom: 1.8rem; }
.mid-cta-in p { margin: 0; color: var(--muted); }
.mid-cta-in p strong { color: var(--paper); }
.mid-cta-actions { display: flex; gap: 0.8rem; }
.faq-chevron { color: var(--muted); }

/* blog 详情 */
.blog-detail-grid { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 3rem; align-items: start; }
.blog-content { min-width: 0; line-height: 1.85; color: var(--paper-soft); }
.blog-content h2 { margin-top: 2.2rem; padding-top: 1rem; border-top: 1px solid var(--line); }
.blog-content h3 { margin-top: 1.6rem; }
.blog-content img { border-radius: var(--radius-sm); margin: 1.2rem 0; height: auto; }
.blog-content a { color: var(--accent); }
.blog-content blockquote { border-left: 3px solid var(--accent); margin: 1.4rem 0; padding: 0.4rem 1.2rem; color: var(--muted); background: var(--ink-2); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.blog-content table { width: 100%; border-collapse: collapse; margin: 1.2rem 0; font-size: 0.9rem; }
.blog-content th, .blog-content td { border: 1px solid var(--line); padding: 0.6rem 0.9rem; text-align: left; }
.blog-content th { background: var(--ink-2); color: var(--paper); }
.toc-link {
    display: block;
    padding: 0.4rem 0.8rem;
    border-left: 2px solid var(--line);
    color: var(--muted);
    font-size: 0.85rem;
    text-decoration: none;
    transition: color 0.2s, border-color 0.2s;
}
.toc-link:hover { color: var(--accent); border-color: var(--accent); }
.blog-prevnext { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; margin-top: 3rem; }
.blog-prevnext a {
    background: var(--ink-2);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    padding: 1rem 1.2rem;
    color: var(--paper-soft);
    text-decoration: none;
    font-size: 0.88rem;
    transition: border-color 0.2s;
}
.blog-prevnext a:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- 7. 表单（询盘契约件） ---------- */
.form { display: grid; gap: 1.1rem; }
.field { display: flex; flex-direction: column; gap: 0.45rem; }
.field label { font-size: 0.85rem; font-weight: 600; color: var(--paper-soft); }
.field label .req { color: var(--accent); margin-left: 2px; }
.field input, .field select, .field textarea {
    width: 100%;
    box-sizing: border-box;
    background: var(--ink-3);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-sm);
    color: var(--paper);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    padding: 0.7rem 0.9rem;
    min-height: 44px;
    transition: border-color 0.2s ease, background 0.2s ease;
}
.field textarea { min-height: 120px; resize: vertical; line-height: 1.6; }
.field input::placeholder, .field textarea::placeholder { color: rgba(154, 163, 169, 0.6); }
.field input:focus, .field select:focus, .field textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--ink-2);
}
.form-hp {
    position: absolute !important;
    left: -9999px !important;
    width: 1px;
    height: 1px;
    overflow: hidden;
}
.form-msg { font-size: 0.88rem; margin-top: 0.2rem; min-height: 1.2em; }
.form-msg-success { color: var(--accent); }
.form-msg-error { color: #ff9d8a; }

/* ---------- 8. 首页专用件 ---------- */
.hero { position: relative; overflow: hidden; isolation: isolate; }
.hero-bg { position: absolute; inset: 0; z-index: -1; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; animation: kenburns 24s ease-in-out infinite alternate; }
.hero-bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        linear-gradient(90deg, rgba(15, 18, 20, 0.95) 0%, rgba(15, 18, 20, 0.86) 40%, rgba(15, 18, 20, 0.4) 75%, rgba(15, 18, 20, 0.22) 100%),
        linear-gradient(0deg, var(--bg) 0%, rgba(15, 18, 20, 0) 26%);
}
.hero-inner { display: flex; align-items: center; min-height: min(86vh, 840px); padding: 6rem 0; }
.hero-anim { max-width: 41rem; }
.hero-title {
    font-size: clamp(2.4rem, 5vw, 3.9rem);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.02em;
    margin: 0.9rem 0 1.1rem;
}
.hero-title .accent { color: var(--accent); }
.hero-sub { color: var(--paper-soft); font-size: 1.06rem; max-width: 34rem; margin-bottom: 1.9rem; }
@keyframes kenburns {
    from { transform: scale(1) translate(0, 0); }
    to { transform: scale(1.08) translate(-1.5%, 1%); }
}
.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    padding: 0.35rem 1rem;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--paper-soft);
}
.hero-tag::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
.hero-actions { display: flex; gap: 0.9rem; flex-wrap: wrap; }

/* 认证跑马灯 */
.cert-strip { border-block: 1px solid var(--line); background: var(--ink-2); overflow: hidden; padding: 1.1rem 0; }
.cert-track {
    display: flex;
    gap: 3rem;
    width: max-content;
    animation: marquee 26s linear infinite;
}
.cert-strip:hover .cert-track { animation-play-state: paused; }
.cert-track > span {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
    white-space: nowrap;
}
.cert-track > span::before { content: ""; width: 8px; height: 8px; background: var(--accent); transform: rotate(45deg); }
@keyframes marquee {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

/* 区块通用 */
.section { padding: 96px 0; }
.section-tight { padding: 64px 0; }
.section-alt { background: var(--ink-2); }
.section-title { font-size: clamp(1.6rem, 3vw, 2.3rem); font-weight: 800; }
.section-lead { color: var(--muted); }
.sec-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 2rem; margin-bottom: 2.8rem; flex-wrap: wrap; }

/* 精选产品：横向滚动轨道 */
.rail-wrap { position: relative; }
.rail-wrap::before,
.rail-wrap::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    width: 56px;
    z-index: 2;
    pointer-events: none;
}
.rail-wrap::before { left: 0; background: linear-gradient(90deg, var(--bg), rgba(15, 18, 20, 0)); }
.rail-wrap::after { right: 0; background: linear-gradient(270deg, var(--bg), rgba(15, 18, 20, 0)); }
.rail {
    display: flex;
    gap: 1.4rem;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    padding: 4px max(24px, calc((100vw - 1400px) / 2)) 20px;
    scrollbar-width: none;
}
.rail::-webkit-scrollbar { display: none; }
.rail-card { flex: 0 0 min(76vw, 330px); scroll-snap-align: start; }
.rail-card .card-media { aspect-ratio: 1 / 1; }
.rail-card h3 { font-size: 1.02rem; }
.rail-cta {
    flex: 0 0 min(76vw, 330px);
    scroll-snap-align: start;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 1rem;
    background: var(--accent);
    color: var(--accent-ink);
    border-radius: var(--radius);
    padding: 2rem 1.8rem;
    text-decoration: none;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.rail-cta:hover { transform: translateY(-4px); box-shadow: 0 18px 40px rgba(200, 245, 66, 0.22); }
.rail-cta strong { font-family: var(--font-display); font-size: 1.25rem; line-height: 1.3; font-weight: 800; }
.rail-cta span { display: inline-flex; align-items: center; gap: 0.45rem; font-weight: 700; font-size: 0.9rem; letter-spacing: 0.06em; text-transform: uppercase; }
.rail-nav { display: flex; gap: 0.6rem; }
.rail-btn {
    width: 46px;
    height: 46px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--ink-2);
    border: 1.5px solid var(--line-strong);
    border-radius: var(--radius-sm);
    color: var(--paper);
    cursor: pointer;
    transition: border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}
.rail-btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.rail-btn:active:not(:disabled) { transform: scale(0.94); }
.rail-btn:disabled { opacity: 0.35; cursor: default; }

/* 实力区：左叙事粘性 + 右计数器 */
.about-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 3.5rem; align-items: start; }
.about-sticky { position: sticky; top: 100px; }
.stat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.2rem; }
.stat-cell {
    background: var(--ink-2);
    border: 1px solid var(--line);
    border-top: 3px solid var(--accent);
    border-radius: var(--radius-sm);
    padding: 1.5rem 1.6rem;
    transition: border-color 0.25s ease, transform 0.25s ease;
}
.stat-cell:hover { border-color: var(--accent); border-top-color: var(--accent); transform: translateY(-3px); }
.stat-num {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 800;
    color: var(--accent);
    line-height: 1.1;
    letter-spacing: -0.01em;
}
.stat-num sup { font-size: 0.55em; }
.stat-label { font-size: 0.85rem; color: var(--paper-soft); margin-top: 0.3rem; font-weight: 600; }
.stat-note { font-size: 0.75rem; color: var(--muted); margin-top: 0.15rem; }

/* 实力台账：接口真实履约/贸易数据 */
.ledger {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 3rem;
    margin-top: 3rem;
    border-top: 2px solid var(--line-strong);
    padding-top: 0.5rem;
}
.ledger-row {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    padding: 1.15rem 0;
    border-bottom: 1px solid var(--line);
}
.ledger-k {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--muted);
}
.ledger-v { font-weight: 700; color: var(--paper); font-size: 0.98rem; line-height: 1.5; }
.ledger-row.wide { grid-column: 1 / -1; }
.cert-row { display: flex; flex-wrap: wrap; align-items: center; gap: 0.7rem; margin-top: 2.2rem; }
.cert-badge {
    border: 2px solid var(--accent);
    border-radius: 6px;
    padding: 0.35rem 0.9rem;
    font-weight: 800;
    font-size: 0.82rem;
    letter-spacing: 0.1em;
    color: var(--accent);
}
.cert-note { flex-basis: 100%; color: var(--muted); font-size: 0.8rem; margin: 0.3rem 0 0; }

/* 服务行（非卡片，分割线式） */
.svc-row {
    display: grid;
    grid-template-columns: 90px 1fr 1.4fr;
    gap: 1.5rem;
    padding: 1.9rem 0;
    border-top: 1px solid var(--line);
    align-items: baseline;
    transition: padding-left 0.25s ease;
}
.svc-row:last-child { border-bottom: 1px solid var(--line); }
.svc-row:hover { padding-left: 0.8rem; }
.svc-num { font-family: var(--font-display); font-weight: 800; font-size: 1.1rem; color: var(--accent); }
.svc-name { font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; margin: 0; }
.svc-desc { color: var(--muted); font-size: 0.92rem; margin: 0; }

/* FAQ 手风琴 */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem 1.4rem; align-items: start; max-width: none; }
.faq-list details {
    background: var(--ink-2);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: border-color 0.25s ease;
}
.faq-list details[open] { border-color: var(--line-strong); }
.faq-list summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.15rem 1.4rem;
    font-weight: 600;
    color: var(--paper);
    user-select: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary .chev { transition: transform 0.25s ease; color: var(--muted); flex-shrink: 0; }
.faq-list details[open] summary .chev { transform: rotate(180deg); color: var(--accent); }
.faq-list .faq-a { padding: 0 1.4rem 1.2rem; color: var(--muted); font-size: 0.92rem; margin: 0; }

/* 区块分隔带 */
.section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--line-strong) 20%, var(--line-strong) 80%, transparent 100%);
    margin: 0 auto;
    max-width: var(--wrap-max);
    opacity: 0.5;
}

/* 询盘收尾区 */
.inquiry-panel {
    background: var(--ink-2);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    padding: 2.2rem;
    position: relative;
    overflow: hidden;
}
.inquiry-panel::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), transparent 70%);
}
.anchor-row { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.anchor-item {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    padding: 0.45rem 1rem;
    font-size: 0.8rem;
    color: var(--paper-soft);
}
.anchor-item b { color: var(--accent); font-weight: 700; }

/* ---------- 8b. 信任助攻模块：工厂实力 / 生产流程 / 项目案例 ---------- */
/* 工厂实力：左大图拼贴 + 右叙事，底部量化带 */
.plant-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 3rem; align-items: start; }
.plant-media { display: grid; grid-template-columns: 1.5fr 1fr; grid-template-rows: 240px 240px; gap: 0.9rem; }
.plant-media figure { position: relative; margin: 0; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); background: var(--ink-3); }
.plant-media figure.main { grid-row: 1 / 3; }
.plant-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.plant-media figure:hover img { transform: scale(1.04); }
.plant-media figcaption {
    position: absolute;
    left: 0; right: 0; bottom: 0;
    padding: 1.6rem 1rem 0.7rem;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--paper);
    background: linear-gradient(0deg, rgba(11, 14, 16, 0.85), rgba(11, 14, 16, 0));
}
.plant-copy .section-title { margin-bottom: 1rem; }
.plant-list { list-style: none; margin: 1.6rem 0 0; padding: 0; display: grid; gap: 0.9rem; }
.plant-list li {
    display: flex;
    gap: 0.8rem;
    align-items: flex-start;
    color: var(--paper-soft);
    font-size: 0.95rem;
    line-height: 1.6;
}
.plant-list li::before { content: ""; flex-shrink: 0; width: 9px; height: 9px; margin-top: 0.5rem; background: var(--accent); transform: rotate(45deg); }
.plant-list li strong { color: var(--paper); }
.plant-band {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.2rem;
    margin-top: 3.2rem;
    padding: 1.8rem 2rem;
    background: var(--ink-2);
    border: 1px solid var(--line);
    border-radius: var(--radius);
}
.plant-band .pb-item { text-align: left; }
.plant-band .pb-num {
    font-family: var(--font-display);
    font-size: clamp(1.7rem, 2.6vw, 2.3rem);
    font-weight: 800;
    color: var(--paper);
    line-height: 1.1;
}
.plant-band .pb-num sup { font-size: 0.55em; color: var(--accent); }
.plant-band .pb-label { font-size: 0.8rem; color: var(--muted); margin-top: 0.3rem; letter-spacing: 0.04em; }

/* 生产流程：五步横向时间轴 */
.process-track { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1.2rem; counter-reset: step; }
.process-step {
    position: relative;
    background: var(--ink-2);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    padding: 1.7rem 1.4rem 1.5rem;
    transition: border-color 0.25s ease, transform 0.25s ease;
}
.process-step:hover { border-color: var(--accent); transform: translateY(-3px); }
.process-step::before {
    counter-increment: step;
    content: "0" counter(step);
    display: block;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent);
    margin-bottom: 0.8rem;
}
.process-step::after {
    content: "";
    position: absolute;
    top: 2.35rem;
    right: -1.2rem;
    width: 1.2rem;
    height: 1px;
    background: var(--line-strong);
}
.process-step:last-child::after { display: none; }
.process-step h3 { font-size: 1rem; margin: 0 0 0.5rem; }
.process-step p { font-size: 0.85rem; color: var(--muted); margin: 0; line-height: 1.6; }
.process-note { margin-top: 1.6rem; font-size: 0.85rem; color: var(--muted); }
.process-note strong { color: var(--paper); }

/* 项目案例：三列等高卡片 */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; align-items: stretch; }
.case-card {
    display: flex;
    flex-direction: column;
    background: var(--ink-2);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    text-decoration: none;
    color: var(--paper);
    transition: border-color 0.25s ease, transform 0.25s ease;
}
.case-card:hover { border-color: var(--line-strong); transform: translateY(-3px); }
.case-media { position: relative; overflow: hidden; background: var(--ink-3); aspect-ratio: 16 / 9; }
.case-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.case-card:hover .case-media img { transform: scale(1.04); }
.case-flag {
    position: absolute;
    top: 0.9rem;
    left: 0.9rem;
    background: rgba(11, 14, 16, 0.82);
    border: 1px solid var(--line-strong);
    border-radius: 6px;
    padding: 0.3rem 0.7rem;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--paper);
}
.case-body { padding: 1.4rem 1.5rem 1.5rem; display: flex; flex-direction: column; gap: 0.8rem; flex: 1; }
.case-body h3 { font-size: 1.05rem; margin: 0; }
.case-metrics { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.case-metric {
    border: 1px solid var(--line-strong);
    border-radius: 6px;
    padding: 0.25rem 0.65rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
}
.case-quote { margin: 0; padding-left: 0.9rem; border-left: 2px solid var(--accent); color: var(--paper-soft); font-size: 0.9rem; line-height: 1.65; }
.case-client { font-size: 0.78rem; color: var(--muted); margin: 0; }


/* ---------- 9. 动效体系（IntersectionObserver 进场） ---------- */
[data-rv] {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
    transition-delay: var(--rv-delay, 0s);
}
[data-rv].rv-in { opacity: 1; transform: none; }
[data-rv="left"] { transform: translateX(-26px); }
[data-rv="right"] { transform: translateX(26px); }
[data-rv="zoom"] { transform: scale(0.94); }
.stagger > * { --rv-delay: 0s; }
.stagger.rv-in > *:nth-child(2) { --rv-delay: 0.08s; }
.stagger.rv-in > *:nth-child(3) { --rv-delay: 0.16s; }
.stagger.rv-in > *:nth-child(4) { --rv-delay: 0.24s; }
.stagger.rv-in > *:nth-child(5) { --rv-delay: 0.32s; }
.stagger.rv-in > *:nth-child(6) { --rv-delay: 0.4s; }

@keyframes rise {
    from { opacity: 0; transform: translateY(26px); }
    to { opacity: 1; transform: none; }
}
.hero-anim > * { animation: rise 0.7s cubic-bezier(0.22, 0.61, 0.36, 1) both; }
.hero-anim > *:nth-child(1) { animation-delay: 0.05s; }
.hero-anim > *:nth-child(2) { animation-delay: 0.15s; }
.hero-anim > *:nth-child(3) { animation-delay: 0.25s; }
.hero-anim > *:nth-child(4) { animation-delay: 0.35s; }

/* ---------- 10. 响应式塌缩 ---------- */
@media (max-width: 1024px) {
    .hero-inner { min-height: min(72vh, 640px); padding: 4.5rem 0; }
    .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
    .about-sticky { position: static; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .blog-detail-grid { grid-template-columns: 1fr; }
    .plant-grid { grid-template-columns: 1fr; gap: 2.4rem; }
    .process-track { grid-template-columns: repeat(2, 1fr); }
    .process-step::after { display: none; }
    .case-grid { grid-template-columns: 1fr; }
}
@media (max-width: 900px) {
    .nav .links { display: none; }
    .nav-cta { display: none; }
    .mobile-menu-toggle { display: flex; }
    .mobile-menu { display: block; }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .case-grid { grid-template-columns: repeat(2, 1fr); }
    .faq-list { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .section { padding: 64px 0; }
    .ledger { grid-template-columns: 1fr; gap: 0; margin-top: 2.2rem; }
    .ledger[style*="repeat(4,1fr)"] { grid-template-columns: 1fr !important; gap: 0 !important; }
    .stat-grid { grid-template-columns: 1fr 1fr; }
    .svc-row { grid-template-columns: 1fr; gap: 0.5rem; padding: 1.5rem 0; }
    .blog-prevnext { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
    .sec-head { margin-bottom: 2rem; }
    .plant-media { grid-template-columns: 1fr; grid-template-rows: 220px 160px 160px; }
    .plant-media figure.main { grid-row: auto; }
    .plant-band { grid-template-columns: 1fr 1fr; }
    .process-track { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
    .grid-3 { grid-template-columns: 1fr; }
    .stat-grid { grid-template-columns: 1fr; }
    .form [style*="grid-template-columns:1fr 1fr"] { grid-template-columns: 1fr !important; }
    .hero-actions .button, .hero-actions .btn { width: 100%; }
}

/* ---------- 12. About 页专用组件（about-us.html 增补） ---------- */
/* About 通栏背景 Hero */
.about-hero-bg {
    position: relative;
    overflow: hidden;
    background: var(--bg);
}
.about-hero-bg > .about-hero-img {
    position: absolute;
    inset: 0;
    z-index: 0;
}
.about-hero-bg > .about-hero-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.about-hero-bg > .about-hero-overlay {
    position: absolute;
    inset: 0;
    z-index: 1;
    background:
        linear-gradient(90deg, rgba(15, 18, 20, 0.55) 0%, rgba(15, 18, 20, 0.32) 45%, rgba(15, 18, 20, 0.08) 100%),
        linear-gradient(0deg, var(--bg) 0%, rgba(15, 18, 20, 0) 35%);
    pointer-events: none;
}
.about-hero-bg > .wrap {
    position: relative;
    z-index: 2;
}

/* 档案式首屏：左主张 + 右身份卡 */
.about-hero-grid {
    display: grid;
    grid-template-columns: 1.25fr 0.85fr;
    gap: 3rem;
    align-items: stretch;
    padding: 4.5rem 0 4rem;
}
/* about-grid 比例变体（配合 .about-grid 使用，塌缩由下方媒体查询接管） */
.about-grid-narrow { grid-template-columns: 0.9fr 1.1fr; }
.about-grid-wide { grid-template-columns: 1.1fr 0.9fr; }
.about-grid-form { grid-template-columns: 0.85fr 1.15fr; align-items: stretch; }

/* OEM 定制项双列清单 */
.oem-list {
    list-style: none;
    margin: 1.2rem 0 0;
    padding: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.7rem 1.4rem;
}
.oem-list li { display: flex; gap: 0.6rem; color: var(--paper-soft); font-size: 0.92rem; }
.oem-list li::before { content: "◆"; color: var(--accent); flex-shrink: 0; font-size: 0.8em; line-height: 1.9; }
.id-card {
    position: relative;
    background: var(--ink-2);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    padding: 1.8rem 1.8rem 1rem;
    overflow: hidden;
    align-self: start;
}
.id-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), transparent 70%);
}
.id-logo { height: 44px; width: auto; margin-bottom: 1rem; }
.id-card dl { margin: 0; }
.id-row {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.72rem 0;
    border-bottom: 1px solid var(--line);
    font-size: 0.88rem;
}
.id-row:last-child { border-bottom: 0; }
.id-row dt { color: var(--muted); flex-shrink: 0; margin: 0; }
.id-row dd { margin: 0; font-weight: 600; text-align: right; color: var(--paper); }

/* 工厂实拍 mosaic：一图竖跨 + 底部通栏 */
.about-mosaic {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: 205px;
    gap: 0.9rem;
}
.about-mosaic figure {
    position: relative;
    margin: 0;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--line);
    background: var(--ink-3);
}
.about-mosaic figure.tall { grid-row: span 2; }
.about-mosaic figure.full { grid-column: 1 / -1; }
.about-mosaic img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.about-mosaic figure:hover img { transform: scale(1.04); }
.about-mosaic figcaption {
    position: absolute;
    left: 0; right: 0; bottom: 0;
    padding: 1.6rem 0.9rem 0.65rem;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--paper);
    background: linear-gradient(0deg, rgba(11, 14, 16, 0.85), rgba(11, 14, 16, 0));
}

/* 商务条款 2×2 + 通栏宽行 */
.term-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.term-card {
    background: var(--ink-2);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    padding: 1.6rem 1.7rem;
    transition: border-color 0.25s ease;
}
.term-card:hover { border-color: var(--line-strong); }
.term-k {
    display: block;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 0.7rem;
}
.term-v {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.02rem;
    color: var(--paper);
    line-height: 1.65;
    margin: 0;
}
.term-card.wide { grid-column: 1 / -1; }
.term-card.wide .term-v { font-family: var(--font-sans); font-size: 0.94rem; font-weight: 400; color: var(--paper-soft); }

/* 尽调问答：单列手风琴（区别于首页双列 faq-list） */
.qa-list { display: grid; gap: 0.8rem; }
.qa-list details {
    background: var(--ink-2);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    transition: border-color 0.25s ease;
}
.qa-list details[open] { border-color: var(--line-strong); }
.qa-list summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.1rem 1.4rem;
    font-weight: 600;
    color: var(--paper);
    user-select: none;
}
.qa-list summary::-webkit-details-marker { display: none; }
.qa-list summary .chev { color: var(--muted); transition: transform 0.25s ease; flex-shrink: 0; }
.qa-list details[open] summary .chev { transform: rotate(180deg); color: var(--accent); }
.qa-list .qa-a { padding: 0 1.4rem 1.2rem; color: var(--muted); font-size: 0.92rem; margin: 0; }

@media (max-width: 1024px) {
    .about-hero-grid { grid-template-columns: 1fr; gap: 2.2rem; padding: 3.5rem 0 3rem; }
    .about-grid-narrow, .about-grid-wide, .about-grid-form { grid-template-columns: 1fr; align-items: start; }
    .about-mosaic { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    .about-mosaic { grid-template-columns: 1fr; grid-auto-rows: 190px; }
    .about-mosaic figure.tall { grid-row: auto; }
    .term-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
    .oem-list { grid-template-columns: 1fr; }
}

/* ---------- 11. 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    [data-rv] { opacity: 1; transform: none; }
    .hero-anim > * { animation: none; }
    .hero-bg img { animation: none; }
    .rail { scroll-behavior: auto; }
    .cert-track { animation: none; flex-wrap: wrap; width: auto; }
}