/* ============================================================
   official — 英文官网模板（肽类跨境独立站）
   主色由模板变量 --accent 决定，各站点不同。
   ============================================================ */

:root {
    --accent: #1D4ED8;
    --accent-dark: #0b2a86;
    --ink: #0f172a;
    --ink-soft: #334155;
    --muted: #64748b;
    --line: #e4e9f0;
    --bg: #ffffff;
    --bg-soft: #f6f8fb;
    --bg-dark: #0b1220;
    --radius: 14px;
    --radius-sm: 10px;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06), 0 1px 3px rgba(15, 23, 42, .04);
    --shadow-md: 0 8px 24px rgba(15, 23, 42, .08);
    --shadow-lg: 0 20px 50px rgba(15, 23, 42, .12);
    --wrap: 1180px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--ink-soft);
    background: var(--bg);
    overflow-x: hidden;
}

a { color: var(--ink); text-decoration: none; transition: color .18s ease; }
a:hover { color: var(--accent); }
ul, ol { list-style: none; }
img { max-width: 100%; height: auto; border: 0; vertical-align: middle; }
h1, h2, h3, h4 { color: var(--ink); line-height: 1.25; font-weight: 700; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.clearfix::after { content: ""; display: table; clear: both; }
.pc-only { display: block; }

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 13px 26px; border-radius: 999px; font-size: 15px; font-weight: 600;
    border: 1px solid transparent; cursor: pointer; white-space: nowrap;
    transition: transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease;
}
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 6px 18px rgba(29, 78, 216, .22); }
.btn-primary:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 12px 26px rgba(29, 78, 216, .3); }
.btn-outline { border-color: var(--line); color: var(--ink); background: #fff; }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-light { background: rgba(255, 255, 255, .12); color: #fff; border-color: rgba(255, 255, 255, .3); }
.btn-light:hover { background: #fff; color: var(--ink); }
.btn-wa { background: #25D366; color: #fff; box-shadow: 0 6px 18px rgba(37, 211, 102, .26); }
.btn-wa:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 12px 26px rgba(37, 211, 102, .34); }
.btn-white { background: #fff; color: var(--ink); }
.btn-white:hover { color: var(--accent); transform: translateY(-2px); }
.btn-sm { padding: 10px 18px; font-size: 14px; }

/* ---------- 顶栏 ---------- */
.topbar { background: var(--bg-dark); color: #cbd5e1; font-size: 13.5px; }
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 18px; min-height: 42px; padding-top: 6px; padding-bottom: 6px; }
.topbar a { color: #e2e8f0; display: inline-flex; align-items: center; gap: 7px; }
.topbar a:hover { color: #fff; }
.topbar .tb-right { display: flex; align-items: center; gap: 22px; flex-shrink: 0; }
.topbar .tb-left { display: flex; align-items: center; gap: 8px; opacity: .85; }

/* ---------- 头部导航 ---------- */
.header {
    position: sticky; top: 0; z-index: 60;
    background: rgba(255, 255, 255, .94);
    backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--line);
}
.header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 74px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-size: 19px; font-weight: 800; color: var(--ink); letter-spacing: -.2px; }
.brand:hover { color: var(--ink); }
.brand-mark {
    width: 34px; height: 34px; border-radius: 10px; flex-shrink: 0;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    display: inline-flex; align-items: center; justify-content: center;
    color: #fff; font-size: 15px; font-weight: 800;
}
.nav { display: flex; align-items: center; gap: 30px; }
.nav a { font-size: 15px; font-weight: 500; color: var(--ink-soft); position: relative; padding: 4px 0; }
.nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 0; height: 2px; background: var(--accent); transition: right .22s ease; }
.nav a:hover, .nav a.active { color: var(--accent); }
.nav a:hover::after, .nav a.active::after { right: 0; }
.header-actions { display: flex; align-items: center; gap: 12px; }
.nav-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: #fff; border-radius: 10px; cursor: pointer; }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
    display: block; width: 18px; height: 2px; background: var(--ink); margin: 0 auto; position: relative; content: "";
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }

/* ---------- Hero ---------- */
.hero {
    position: relative; overflow: hidden;
    background: linear-gradient(180deg, var(--bg-soft) 0%, #fff 100%);
    border-bottom: 1px solid var(--line);
}
.hero::before {
    content: ""; position: absolute; right: -180px; top: -160px; width: 520px; height: 520px; border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, rgba(29, 78, 216, .16), transparent 65%);
    background-image: radial-gradient(circle at 30% 30%, var(--accent), transparent 62%);
    opacity: .16; pointer-events: none;
}
.hero-grid { position: relative; display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; padding: 74px 0 78px; }
.eyebrow {
    display: inline-flex; align-items: center; gap: 9px; margin-bottom: 20px;
    font-size: 12.5px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--accent);
    background: rgba(29, 78, 216, .08); border-radius: 999px; padding: 7px 15px;
}
.eyebrow i { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); display: inline-block; }
.hero h1 { font-size: 46px; letter-spacing: -.8px; margin-bottom: 18px; }
.hero .lead { font-size: 17px; color: var(--muted); max-width: 620px; margin-bottom: 26px; }
.usp { margin-bottom: 32px; display: grid; gap: 11px; }
.usp li { display: flex; align-items: flex-start; gap: 11px; font-size: 15.5px; color: var(--ink-soft); }
.usp li::before {
    content: "✓"; flex-shrink: 0; width: 21px; height: 21px; margin-top: 2px;
    display: inline-flex; align-items: center; justify-content: center;
    border-radius: 50%; background: rgba(29, 78, 216, .1); color: var(--accent); font-size: 12px; font-weight: 700;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.hero-note { margin-top: 18px; font-size: 13.5px; color: var(--muted); }
.hero-note b { color: var(--ink); font-weight: 600; }

/* 规格卡 */
.hero-card {
    background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 26px;
    box-shadow: var(--shadow-lg); position: relative;
}
.hero-card .hc-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 15px; border-bottom: 1px solid var(--line); margin-bottom: 6px; }
.hero-card .hc-head h3 { font-size: 15px; letter-spacing: .02em; }
.hero-card .hc-tag { font-size: 11.5px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); background: rgba(29, 78, 216, .08); padding: 4px 10px; border-radius: 999px; }
.spec-row { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; padding: 11px 0; border-bottom: 1px dashed var(--line); font-size: 14.5px; }
.spec-row:last-child { border-bottom: 0; }
.spec-row .k { color: var(--muted); }
.spec-row .v { color: var(--ink); font-weight: 600; text-align: right; }
.hero-card .hc-foot { margin-top: 16px; }
.hero-card .hc-foot .btn { width: 100%; }

/* ---------- 数据条 ---------- */
.stats { background: var(--bg-dark); color: #e2e8f0; }
.stats .wrap { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; padding: 30px 24px; }
.stat { display: flex; gap: 14px; align-items: flex-start; }
.stat .si {
    flex-shrink: 0; width: 40px; height: 40px; border-radius: 11px;
    background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .12);
    display: inline-flex; align-items: center; justify-content: center; font-size: 17px; color: #fff;
}
.stat b { display: block; color: #fff; font-size: 16px; font-weight: 700; line-height: 1.4; }
.stat span { font-size: 13.5px; color: #94a3b8; }

/* ---------- 通用区块 ---------- */
.section { padding: 78px 0; }
.section.soft { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 720px; margin-bottom: 44px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 { font-size: 33px; letter-spacing: -.5px; margin-bottom: 14px; }
.section-head p { font-size: 16.5px; color: var(--muted); }
.section-head .kicker { display: block; font-size: 12.5px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); margin-bottom: 12px; }

/* ---------- 产品线 ---------- */
.grid-prod { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.prod-card {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 24px;
    box-shadow: var(--shadow-sm); transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    display: flex; flex-direction: column;
}
.prod-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(29, 78, 216, .35); }
.prod-icon {
    width: 46px; height: 46px; border-radius: 13px; margin-bottom: 18px;
    background: rgba(29, 78, 216, .08); color: var(--accent);
    display: inline-flex; align-items: center; justify-content: center; font-size: 20px;
}
.prod-card h3 { font-size: 18.5px; margin-bottom: 9px; }
.prod-card p { font-size: 14.5px; color: var(--muted); flex: 1; }
.link-more { display: inline-flex; align-items: center; gap: 6px; margin-top: 18px; font-size: 14.5px; font-weight: 600; color: var(--accent); }
.link-more::after { content: "→"; transition: transform .2s ease; }
.prod-card:hover .link-more::after { transform: translateX(4px); }

/* ---------- 质量与合规 ---------- */
.quality-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.check-list li { display: flex; gap: 12px; padding: 13px 0; border-bottom: 1px dashed var(--line); font-size: 15.5px; }
.check-list li:last-child { border-bottom: 0; }
.check-list li::before {
    content: "✓"; flex-shrink: 0; width: 22px; height: 22px; margin-top: 3px;
    display: inline-flex; align-items: center; justify-content: center; border-radius: 50%;
    background: rgba(37, 211, 102, .12); color: #12885a; font-size: 12px; font-weight: 700;
}
.check-list b { display: block; color: var(--ink); font-weight: 600; font-size: 15.5px; }
.check-list span { font-size: 14px; color: var(--muted); }
.doc-panel { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 28px; box-shadow: var(--shadow-md); }
.doc-panel h3 { font-size: 16px; margin-bottom: 6px; }
.doc-panel > p { font-size: 14px; color: var(--muted); margin-bottom: 20px; }
.doc-badges { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.doc-badge {
    border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 15px 16px; background: var(--bg-soft);
}
.doc-badge b { display: block; font-size: 15px; color: var(--ink); letter-spacing: .02em; }
.doc-badge span { font-size: 12.5px; color: var(--muted); }
.doc-note { margin-top: 18px; padding: 13px 15px; border-radius: var(--radius-sm); background: rgba(29, 78, 216, .06); font-size: 13.5px; color: var(--ink-soft); }

/* ---------- 优势 ---------- */
.grid-feat { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.feat-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 22px; box-shadow: var(--shadow-sm); }
.feat-card .fc-icon { font-size: 22px; color: var(--accent); margin-bottom: 14px; display: block; }
.feat-card h3 { font-size: 16.5px; margin-bottom: 8px; }
.feat-card p { font-size: 14px; color: var(--muted); }

/* ---------- 指南 / 文章卡 ---------- */
.grid-guides { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.guide-card {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
    display: flex; flex-direction: column; box-shadow: var(--shadow-sm);
    transition: transform .2s ease, box-shadow .2s ease;
}
.guide-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.guide-thumb {
    height: 132px; position: relative; overflow: hidden;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    display: flex; align-items: center; justify-content: center;
}
.guide-thumb::after {
    content: ""; position: absolute; inset: 0;
    background-image: radial-gradient(circle at 18% 22%, rgba(255, 255, 255, .28), transparent 45%),
                      radial-gradient(circle at 82% 78%, rgba(255, 255, 255, .18), transparent 42%);
}
.guide-thumb .gt-mark { position: relative; color: rgba(255, 255, 255, .92); font-size: 34px; font-weight: 800; letter-spacing: -.02em; }
.guide-body { padding: 20px 20px 22px; display: flex; flex-direction: column; flex: 1; }
.guide-cat { font-size: 11.5px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px; }
.guide-body h3 { font-size: 16.5px; line-height: 1.45; margin-bottom: 10px; }
.guide-body h3 a { color: var(--ink); }
.guide-body h3 a:hover { color: var(--accent); }
.guide-body p { font-size: 14px; color: var(--muted); flex: 1; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.guide-meta { margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--line); font-size: 12.5px; color: var(--muted); display: flex; justify-content: space-between; gap: 10px; }

/* ---------- 流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; counter-reset: step; }
.step { position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 24px; }
.step-num {
    width: 40px; height: 40px; border-radius: 12px; margin-bottom: 16px;
    background: var(--accent); color: #fff; font-weight: 800; font-size: 16px;
    display: inline-flex; align-items: center; justify-content: center;
}
.step h3 { font-size: 17px; margin-bottom: 8px; }
.step p { font-size: 14.5px; color: var(--muted); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-list details { border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fff; margin-bottom: 12px; overflow: hidden; }
.faq-list summary {
    cursor: pointer; padding: 17px 22px; font-size: 16px; font-weight: 600; color: var(--ink);
    list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; font-size: 20px; color: var(--accent); font-weight: 400; flex-shrink: 0; }
.faq-list details[open] summary::after { content: "–"; }
.faq-list details[open] summary { border-bottom: 1px solid var(--line); }
.faq-list .faq-body { padding: 17px 22px 20px; font-size: 15px; color: var(--muted); }

/* ---------- 联系我们 ---------- */
.contact { background: var(--bg-dark); color: #cbd5e1; padding: 78px 0; position: relative; overflow: hidden; }
.contact::before {
    content: ""; position: absolute; left: -160px; bottom: -200px; width: 520px; height: 520px; border-radius: 50%;
    background: var(--accent); opacity: .18; pointer-events: none;
}
.contact-grid { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 52px; align-items: start; }
.contact h2 { color: #fff; font-size: 33px; letter-spacing: -.4px; margin-bottom: 16px; }
.contact .c-lead { font-size: 16.5px; color: #94a3b8; margin-bottom: 30px; }
.contact-channels { display: grid; gap: 14px; margin-bottom: 26px; }
.channel {
    display: flex; align-items: center; gap: 15px; padding: 16px 18px;
    border: 1px solid rgba(255, 255, 255, .14); border-radius: var(--radius); background: rgba(255, 255, 255, .04);
}
.channel .ci { width: 42px; height: 42px; border-radius: 12px; flex-shrink: 0; display: inline-flex; align-items: center; justify-content: center; font-size: 19px; background: rgba(255, 255, 255, .1); }
.channel .ci.wa { background: rgba(37, 211, 102, .18); color: #4ade80; }
.channel .ct { flex: 1; min-width: 0; }
.channel .ct b { display: block; color: #fff; font-size: 15px; font-weight: 600; }
.channel .ct span { font-size: 13.5px; color: #94a3b8; word-break: break-all; }
.channel a.ct:hover b { color: #4ade80; }

.form-card { background: #fff; border-radius: 18px; padding: 30px; box-shadow: var(--shadow-lg); }
.form-card h3 { font-size: 19px; margin-bottom: 6px; }
.form-card > p { font-size: 14px; color: var(--muted); margin-bottom: 22px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; font-weight: 600; color: var(--ink); margin-bottom: 7px; }
.field input, .field textarea, .field select {
    width: 100%; padding: 12px 14px; font-size: 14.5px; font-family: inherit;
    border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--bg-soft); color: var(--ink);
    transition: border-color .18s ease, background .18s ease;
}
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--accent); background: #fff; }
.field textarea { min-height: 104px; resize: vertical; }
.form-card .btn { width: 100%; margin-top: 6px; }
.form-hint { margin-top: 12px; font-size: 12.5px; color: var(--muted); text-align: center; }

/* ---------- 关于 ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 52px; align-items: center; }
.about-grid h2 { font-size: 32px; margin-bottom: 16px; }
.about-grid p { font-size: 16px; color: var(--muted); margin-bottom: 16px; }
.about-points { display: grid; gap: 12px; margin-top: 22px; }
.about-points li { display: flex; gap: 11px; font-size: 15px; }
.about-points li::before { content: "—"; color: var(--accent); font-weight: 700; }
.about-visual {
    border-radius: 18px; padding: 34px; color: #fff;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    box-shadow: var(--shadow-lg);
}
.about-visual h3 { color: #fff; font-size: 20px; margin-bottom: 10px; }
.about-visual p { color: rgba(255, 255, 255, .82); font-size: 14.5px; margin-bottom: 20px; }
.about-visual .av-rows { display: grid; gap: 10px; }
.about-visual .av-row { display: flex; justify-content: space-between; gap: 14px; font-size: 14px; padding: 10px 0; border-bottom: 1px solid rgba(255, 255, 255, .2); }
.about-visual .av-row:last-child { border-bottom: 0; }
.about-visual .av-row span { color: rgba(255, 255, 255, .78); }

/* ---------- 底部 CTA 带 ---------- */
.cta-band { padding: 0 0 78px; }
.cta-band-inner {
    border-radius: 20px; padding: 42px 46px; background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    display: flex; align-items: center; justify-content: space-between; gap: 34px; flex-wrap: wrap; box-shadow: var(--shadow-lg);
}
.cta-band-inner h2 { color: #fff; font-size: 27px; margin-bottom: 8px; }
.cta-band-inner p { color: rgba(255, 255, 255, .84); font-size: 15.5px; }
.cta-band-actions { display: flex; gap: 13px; flex-wrap: wrap; }
.cta-band-actions .btn-light { background: rgba(255, 255, 255, .16); }

/* ---------- 页脚 ---------- */
.footer { background: #070c16; color: #8b98a9; padding: 58px 0 26px; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 38px; border-bottom: 1px solid rgba(255, 255, 255, .1); }
.footer .brand { color: #fff; margin-bottom: 14px; }
.footer .f-about { font-size: 14px; color: #8b98a9; max-width: 320px; }
.footer h4 { color: #fff; font-size: 14.5px; margin-bottom: 16px; letter-spacing: .04em; }
.footer-col ul { display: grid; gap: 10px; }
.footer-col a { color: #8b98a9; font-size: 14px; }
.footer-col a:hover { color: #fff; }
.footer-contact li { display: flex; gap: 10px; margin-bottom: 11px; font-size: 14px; color: #8b98a9; }
.footer-contact li b { color: #fff; font-weight: 600; }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; padding-top: 22px; font-size: 13px; }
.footer-bottom .f-links { display: flex; gap: 20px; flex-wrap: wrap; }
.stats-code { display: none; }

/* ---------- 悬浮 WhatsApp ---------- */
.float-wa {
    position: fixed; right: 22px; bottom: 22px; z-index: 80;
    display: inline-flex; align-items: center; gap: 10px; padding: 13px 20px 13px 15px;
    background: #25D366; color: #fff; border-radius: 999px; font-size: 14.5px; font-weight: 600;
    box-shadow: 0 12px 30px rgba(37, 211, 102, .38);
    transition: transform .2s ease, box-shadow .2s ease;
}
.float-wa:hover { color: #fff; transform: translateY(-3px); box-shadow: 0 18px 36px rgba(37, 211, 102, .46); }
.float-wa svg { width: 26px; height: 26px; fill: #fff; flex-shrink: 0; }

/* ---------- 面包屑 / 列表页 ---------- */
.page-hero { background: linear-gradient(180deg, var(--bg-soft) 0%, #fff 100%); border-bottom: 1px solid var(--line); padding: 42px 0 46px; }
.breadcrumb { font-size: 13px; color: var(--muted); margin-bottom: 16px; display: flex; gap: 8px; flex-wrap: wrap; }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--accent); }
.page-hero h1 { font-size: 36px; letter-spacing: -.6px; margin-bottom: 14px; }
.page-hero p { font-size: 16.5px; color: var(--muted); max-width: 760px; }
.page-hero .ph-meta { margin-top: 18px; font-size: 14px; color: var(--muted); }
.page-hero .ph-meta b { color: var(--ink); font-weight: 600; }

.chip-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 34px; }
.chip {
    padding: 8px 16px; border-radius: 999px; border: 1px solid var(--line); background: #fff;
    font-size: 13.5px; color: var(--ink-soft); font-weight: 500;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.list-layout { display: grid; grid-template-columns: 1fr 320px; gap: 44px; align-items: start; }
.side-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow-sm); margin-bottom: 20px; }
.side-card h3 { font-size: 16.5px; margin-bottom: 10px; }
.side-card p { font-size: 14px; color: var(--muted); margin-bottom: 18px; }
.side-card .btn { width: 100%; }
.side-card.dark { background: var(--bg-dark); border-color: transparent; }
.side-card.dark h3 { color: #fff; }
.side-card.dark p { color: #94a3b8; }
.side-links { display: grid; gap: 4px; }
.side-links a { font-size: 14.5px; color: var(--ink-soft); padding: 9px 0; border-bottom: 1px dashed var(--line); }
.side-links a:last-child { border-bottom: 0; }
.side-links a:hover { color: var(--accent); }

/* ---------- 详情页 ---------- */
.detail-layout { display: grid; grid-template-columns: 1fr 320px; gap: 44px; align-items: start; padding: 46px 0 70px; }
.article-head { padding-bottom: 26px; border-bottom: 1px solid var(--line); margin-bottom: 30px; }
.article-head h1 { font-size: 34px; letter-spacing: -.5px; line-height: 1.3; margin-bottom: 16px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 20px; font-size: 13.5px; color: var(--muted); }
.article-meta b { color: var(--ink); font-weight: 600; }

.article-content { font-size: 16.5px; line-height: 1.85; color: #334155; }
.article-content p { margin-bottom: 20px; }
.article-content h2 { font-size: 25px; margin: 40px 0 16px; padding-bottom: 10px; border-bottom: 2px solid rgba(29, 78, 216, .18); }
.article-content h3 { font-size: 19.5px; margin: 30px 0 12px; }
.article-content h4 { font-size: 17px; margin: 24px 0 10px; }
.article-content ul, .article-content ol { margin: 18px 0 22px; padding-left: 24px; }
.article-content ul li { list-style: disc; margin-bottom: 9px; }
.article-content ol li { list-style: decimal; margin-bottom: 9px; }
.article-content img { border-radius: var(--radius-sm); margin: 22px 0; }
.article-content blockquote {
    background: var(--bg-soft); border-left: 4px solid var(--accent); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    padding: 18px 22px; margin: 24px 0; font-size: 15.5px; color: var(--ink-soft);
}
.article-content blockquote p:last-child { margin-bottom: 0; }
.article-content table { width: 100%; border-collapse: collapse; margin: 22px 0; font-size: 15px; }
.article-content th, .article-content td { border: 1px solid var(--line); padding: 11px 13px; text-align: left; }
.article-content th { background: var(--bg-soft); font-weight: 600; color: var(--ink); }
.article-content code { background: var(--bg-soft); padding: 2px 7px; border-radius: 5px; font-family: Consolas, Monaco, monospace; font-size: 14.5px; color: var(--accent-dark); }
.article-content pre { background: var(--bg-dark); color: #e2e8f0; padding: 20px 22px; border-radius: var(--radius-sm); overflow-x: auto; margin: 22px 0; }
.article-content pre code { background: none; color: inherit; padding: 0; }
.article-content strong { color: var(--ink); }
.article-content a { color: var(--accent); border-bottom: 1px solid rgba(29, 78, 216, .4); }
.article-content a:hover { color: var(--accent-dark); }
.article-content hr { border: 0; border-top: 1px solid var(--line); margin: 34px 0; }

.tag-row { display: flex; flex-wrap: wrap; gap: 9px; align-items: center; padding: 24px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); margin: 36px 0; }
.tag-row .tr-label { font-size: 12.5px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-right: 6px; }
.tag-row a { padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line); font-size: 13px; color: var(--ink-soft); }
.tag-row a:hover { border-color: var(--accent); color: var(--accent); }
.post-nav { display: grid; gap: 12px; margin: 30px 0; }
.post-nav-item { display: flex; gap: 14px; align-items: baseline; font-size: 15px; padding: 12px 16px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fff; }
.post-nav-item .nl { flex-shrink: 0; font-size: 12.5px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.post-nav-item .nn { color: #a9b4c2; }

/* ---------- 分页 ---------- */
.pagination { text-align: center; padding: 44px 0 0; }
.pagination a, .pagination span {
    display: inline-block; min-width: 40px; padding: 9px 14px; margin: 0 4px;
    font-size: 14px; color: var(--ink-soft); border: 1px solid var(--line); border-radius: 9px; background: #fff;
    transition: all .18s ease;
}
.pagination a:hover { color: var(--accent); border-color: var(--accent); }
.pagination .current { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.pagination .disabled { color: #c3ccd8; background: var(--bg-soft); }

.empty-state { padding: 70px 0; text-align: center; color: var(--muted); border: 1px dashed var(--line); border-radius: var(--radius); background: var(--bg-soft); }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
    .hero-grid, .quality-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
    .grid-prod, .grid-guides { grid-template-columns: repeat(2, 1fr); }
    .grid-feat { grid-template-columns: repeat(2, 1fr); }
    .list-layout, .detail-layout { grid-template-columns: 1fr; gap: 34px; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
}

@media (max-width: 820px) {
    .pc-only { display: none; }
    .nav {
        position: absolute; left: 0; right: 0; top: 100%; flex-direction: column; align-items: stretch; gap: 0;
        background: #fff; border-bottom: 1px solid var(--line); padding: 8px 24px 18px;
        box-shadow: var(--shadow-md); display: none;
    }
    .nav.open { display: flex; }
    .nav a { padding: 13px 0; border-bottom: 1px solid var(--line); }
    .nav a::after { display: none; }
    .nav-toggle { display: block; }
    .header-actions .btn { display: none; }
    .topbar .tb-left { display: none; }
    .topbar .wrap { justify-content: center; }
    .stats .wrap { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .hero h1 { font-size: 34px; }
    .hero-grid { padding: 48px 0 54px; }
    .section { padding: 56px 0; }
    .section-head h2, .contact h2, .about-grid h2 { font-size: 26px; }
    .page-hero h1 { font-size: 28px; }
    .article-head h1 { font-size: 26px; }
    .cta-band-inner { padding: 30px 24px; }
}

@media (max-width: 560px) {
    .wrap { padding: 0 18px; }
    .grid-prod, .grid-guides, .grid-feat, .steps, .form-row, .doc-badges { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .float-wa span { display: none; }
    .float-wa { padding: 14px; }
    .btn { padding: 12px 22px; font-size: 14.5px; }
    .hero-cta .btn { width: 100%; }
}