/* =========================================================
   智学云 · 企业级产品展示站点  Design System  (v2 · editorial / premium)
   方向：深蓝墨 + 克制金 + 中文衬线大标题 + 大留白 + 发丝描边
   ========================================================= */

:root{
  --ink:#0d1730;          /* 深蓝墨 主文字 */
  --ink-2:#16203a;
  --ink-soft:#3a445c;
  --muted:#5a6478;
  --line:#dfe6f2;         /* 发丝描边 */
  --line-soft:#eaf0f9;
  --bg:#ffffff;
  --bg-soft:#f4f7fd;      /* 浅灰底 */
  --bg-soft2:#e9f0fb;
  --navy:#0d1730;         /* Hero / 深色块 */
  --navy-2:#142548;
  --gold:#b8893e;         /* 克制金 强调 */
  --gold-deep:#8a6428;
  --gold-soft:#f7f0e2;
  --radius:16px;
  --radius-s:11px;
  --radius-xs:8px;
  --shadow:0 12px 34px rgba(13,23,48,.07);
  --shadow-lg:0 28px 60px rgba(13,23,48,.14);
  --shadow-xs:0 1px 2px rgba(13,23,48,.04);
  --shadow-card:0 6px 22px rgba(13,23,48,.09);
  --shadow-card-hover:0 18px 46px rgba(13,23,48,.13);
  --maxw:1180px;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei","Segoe UI",system-ui,-apple-system,sans-serif;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  /* 字号阶梯（统一搭配） */
  --fs-xs:12px; --fs-sm:13px; --fs-base:15px; --fs-md:15px; --fs-lg:16px;
  --fs-xl:18px; --fs-2xl:21px; --fs-3xl:24px; --fs-4xl:30px; --fs-5xl:38px; --fs-6xl:48px;
  /* 间距比例（8pt 基准缩放） */
  --sp-1:6px; --sp-2:10px; --sp-3:14px; --sp-4:18px; --sp-5:24px; --sp-6:32px;
  --sp-7:48px; --sp-8:64px; --sp-9:96px;
  /* 深色区文本对比（达标 WCAG AA） */
  --on-navy:#f4f6fb; --on-navy-soft:#d3d9e8; --on-navy-mute:#bcc3d8;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-sans);color:var(--ink);background:var(--bg);
  line-height:1.85;font-size:16px;font-weight:400;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 32px}
.section{padding:104px 0;
  background-image:radial-gradient(circle at 50% -8%,rgba(184,137,62,.05),transparent 52%),radial-gradient(circle at 85% 105%,rgba(13,23,48,.03),transparent 42%)}
.section.soft{background-color:var(--bg-soft);background-image:radial-gradient(circle at 50% -8%,rgba(184,137,62,.05),transparent 52%),radial-gradient(circle at 85% 105%,rgba(13,23,48,.03),transparent 42%);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section.tight{padding:74px 0}

/* ---------- 卡片基底（统一静态阴影 + 层次） ---------- */
.feature,.pcard,.rcard,.article,.role,.scenario,.case,.cert,.svc,.adv,.res,
.dl-card,.backer,.logo-cell,.award,.step,.tier,.caseidx,.contact-form-card,
.login-card,.spec,.cmp,.ovalue .ov{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-card)}

/* ---------- Typography ---------- */
.eyebrow{display:inline-block;font-size:13px;letter-spacing:.14em;font-weight:700;color:var(--gold-deep);text-transform:none;margin-bottom:18px}
.eyebrow::before{content:"";display:inline-block;width:30px;height:1.5px;background:var(--gold);vertical-align:middle;margin-right:14px}
.eyebrow::after{content:"";display:inline-block;width:30px;height:1.5px;background:var(--gold);vertical-align:middle;margin-left:14px}
h1,h2,h3,h4{font-family:var(--font-serif);line-height:1.3;color:var(--ink);font-weight:600;letter-spacing:.3px}
.sec-head{max-width:800px;margin-bottom:60px}
.sec-head h2{font-size:38px;font-weight:700;letter-spacing:.5px}
.sec-head p{margin-top:18px;color:var(--muted);font-size:17px;font-weight:400;line-height:1.9}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head.center .eyebrow::before,.sec-head.center .eyebrow::after{display:none}
.lede{font-size:18px;color:var(--ink-soft);line-height:2;font-weight:400;max-width:940px}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 30px;border-radius:999px;font-size:15px;font-weight:500;transition:transform .22s,box-shadow .22s,background .22s;cursor:pointer;border:1px solid transparent;font-family:var(--font-sans)}
.btn-primary{background:linear-gradient(135deg,var(--gold,#b8893e),var(--gold-2,#d6a85c));color:#1a1304;box-shadow:0 12px 26px rgba(138,100,40,.22)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(13,23,48,.3);color:#1a1304}
.btn-gold{background:linear-gradient(135deg,var(--gold,#b8893e),var(--gold-2,#d6a85c));color:#1a1304;font-weight:500;box-shadow:0 12px 26px rgba(184,137,62,.3)}
.btn-gold:hover{transform:translateY(-2px);background:linear-gradient(135deg,var(--gold,#b8893e),var(--gold-2,#d6a85c));color:#1a1304;box-shadow:0 18px 34px rgba(184,137,62,.4)}
.btn-gold:active,.btn-primary:active{transform:translateY(1px)}
.btn-ghost{border:1px solid var(--line);color:var(--ink-soft);background:#fff}
.btn-ghost:hover{border-color:var(--navy);color:var(--navy);transform:translateY(-2px)}
.btn-light{border:1px solid rgba(255,255,255,.42);color:#fff}
.btn-light:hover{background:rgba(255,255,255,.12)}
.link-more{display:inline-flex;align-items:center;gap:7px;color:var(--gold-deep);font-weight:500;font-size:15px;margin-top:20px;font-family:var(--font-sans)}
.link-more::after{content:"→";transition:transform .3s}
.link-more:hover::after{transform:translateX(5px)}


/* ---------- Breadcrumb ---------- */
.breadcrumb{display:flex;align-items:center;gap:9px;font-size:13.5px;color:var(--muted);margin-bottom:24px;font-weight:400}
.breadcrumb a:hover{color:var(--gold-deep)}
.breadcrumb .sep{opacity:.45}
.breadcrumb .cur{color:var(--ink-soft);font-weight:500}

/* ---------- Hero (home) ---------- */
.hero{position:relative;overflow:hidden;color:var(--ink);padding:120px 0 104px;
  background:radial-gradient(820px 520px at 82% -12%,rgba(184,137,62,.14),transparent 58%),
             radial-gradient(90% 220% at 62% 160%,rgba(13,23,48,.06),transparent 60%),
             linear-gradient(150deg,#eef2f9 0%,#f5f8fd 55%,#eef2f9 100%)}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;z-index:0;
  background-image:linear-gradient(rgba(13,23,48,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(13,23,48,.05) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:radial-gradient(70% 70% at 50% 50%,#000,transparent);
  mask-image:radial-gradient(70% 70% at 50% 50%,#000,transparent)}
.background-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(13,23,48,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(13,23,48,.045) 1px,transparent 1px);background-size:52px 52px;mask-image:radial-gradient(circle at 50% 26%,#000,transparent 74%);pointer-events:none}
.hero .wrap{position:relative;z-index:2}
.hero .eyebrow{color:var(--gold)}
.hero .eyebrow::before,.hero .eyebrow::after{background:var(--gold)}
.hero h1{font-size:clamp(34px,4.8vw,56px);font-weight:700;max-width:980px;line-height:1.28;text-shadow:none}
.hero h1 .hl{color:var(--gold);font-style:normal}
.hero p.sub{margin-top:26px;font-size:18px;color:var(--ink-soft);max-width:800px;line-height:1.95;font-weight:400}
.hero-cta{display:flex;gap:16px;margin-top:40px;flex-wrap:wrap}
.trust{margin-top:64px;display:flex;flex-wrap:wrap;gap:0 56px;border-top:1px solid var(--line);padding-top:36px}
.trust .t{display:flex;flex-direction:column;padding-right:24px}
.trust .t b{font-family:var(--font-serif);font-size:34px;font-weight:700;letter-spacing:.5px;color:var(--navy)}
.trust .t b em{font-style:normal;font-size:17px;color:var(--gold);margin-left:4px;font-family:var(--font-sans)}
.trust .t span{font-size:13.5px;color:var(--ink-soft);margin-top:4px;font-weight:400}

/* ---------- Hero (inner page) ---------- */
.hero-inner{position:relative;overflow:hidden;color:var(--ink);padding:80px 0 74px;
  background:radial-gradient(720px 440px at 86% -22%,rgba(184,137,62,.14),transparent 58%),
             linear-gradient(150deg,#eef2f9 0%,#f5f8fd 60%,#eef2f9 100%)}
.hero-inner .wrap{position:relative;z-index:2}
.hero-inner h1{font-size:clamp(28px,3.8vw,46px);font-weight:700;max-width:900px;line-height:1.3}
.hero-inner p.sub{margin-top:18px;font-size:17.5px;color:var(--ink-soft);max-width:780px;line-height:1.9;font-weight:400}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.chip{background:rgba(13,23,48,.05);border:1px solid rgba(13,23,48,.12);border-radius:999px;padding:8px 18px;font-size:13.5px;font-weight:500;color:var(--ink-soft);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);box-shadow:0 2px 8px rgba(13,23,48,.06)}
.chip.gold{background:rgba(184,137,62,.12);border-color:rgba(184,137,62,.4);color:var(--gold-deep)}

/* ---------- Stats row ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:8px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
.stat{padding:34px 28px;text-align:center;border-right:1px solid var(--line-soft);transition:background .25s}
.stat:last-child{border-right:none}
.stat:hover{background:var(--bg-soft)}
.stat b{display:block;font-family:var(--font-serif);font-size:40px;font-weight:700;color:var(--navy);letter-spacing:.5px}
.stat b em{font-style:normal;font-size:18px;color:var(--gold-deep);margin-left:3px;font-family:var(--font-sans)}
.stat span{display:block;margin-top:8px;font-size:14px;color:var(--muted);font-weight:400}

/* ---------- Feature grid ---------- */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feature{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:34px 30px;transition:transform .28s,box-shadow .28s,border-color .28s;position:relative;overflow:hidden}
.feature:hover{transform:translateY(-7px);box-shadow:var(--shadow-lg);border-color:var(--line)}
.feature .ficon{width:50px;height:50px;border-radius:13px;background:var(--gold-soft);color:var(--gold-deep);display:flex;align-items:center;justify-content:center;margin-bottom:20px;transition:background .28s,color .28s}
.feature:hover .ficon{background:var(--cta);color:var(--cta-text)}
.feature .ficon svg{width:26px;height:26px}
.feature h3{font-size:19px;font-weight:600;margin-bottom:11px;font-family:var(--font-serif)}
.feature p{font-size:15px;color:var(--muted);line-height:1.85;font-weight:400}
.feature ul{margin-top:15px;display:flex;flex-direction:column;gap:9px}
.feature ul li{font-size:13.5px;color:var(--ink-soft);padding-left:20px;position:relative;line-height:1.7;font-weight:400}
.feature ul li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--gold)}
.feature .ftag{position:absolute;top:26px;right:28px;font-size:12px;letter-spacing:1px;color:var(--muted);font-weight:500;font-family:var(--font-sans)}

/* ---------- Spec table ---------- */
.spec-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:24px;flex-wrap:wrap;gap:8px}
.spec-head h3{font-size:24px;font-weight:700;font-family:var(--font-serif)}
.spec-head .tag{font-size:12.5px;color:var(--gold-deep);font-weight:500;letter-spacing:1px}
.spec{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.spec tr{border-bottom:1px solid var(--line-soft)}
.spec tr:last-child{border-bottom:none}
.spec th{width:26%;text-align:left;padding:16px 24px;background:var(--bg-soft);color:var(--ink-soft);font-weight:500;font-size:15px;vertical-align:top}
.spec td{padding:16px 24px;font-size:15px;color:var(--ink-soft);line-height:1.85;font-weight:400}
.spec tr:nth-child(even) td{background:#fcfcfe}

/* ---------- Scenario cards ---------- */
.scenarios{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.scenario{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:30px 28px;transition:transform .25s,box-shadow .25s;border-top:3px solid var(--gold)}
.scenario:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.scenario .sno{font-family:var(--font-serif);font-size:24px;font-weight:700;color:var(--gold);margin-bottom:10px}
.scenario h4{font-size:18px;font-weight:600;color:var(--navy);margin-bottom:9px;font-family:var(--font-serif)}
.scenario p{font-size:15px;color:var(--ink-soft);line-height:1.85;font-weight:400}

/* ---------- Case showcase ---------- */
.cases{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.case{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .28s,box-shadow .28s}
.case:hover{transform:translateY(-7px);box-shadow:var(--shadow-lg)}
.case-media{height:158px;position:relative;display:flex;align-items:flex-end;padding:24px;color:var(--ink);
  background:linear-gradient(150deg,#eef2f9,#f7fafe)}
.case-media::after{content:"";position:absolute;right:-40px;top:-40px;width:180px;height:180px;border-radius:50%;background:radial-gradient(circle,rgba(184,137,62,.4),transparent 70%)}
.case-media .ctag{font-size:12px;font-weight:500;letter-spacing:1px;background:var(--gold-soft);padding:5px 13px;border-radius:999px;position:relative;z-index:2}
.case-media h4{position:relative;z-index:2;font-size:20px;font-weight:700;margin-top:12px;font-family:var(--font-serif)}
.case-body{padding:28px 30px}
.case-body p{font-size:15px;color:var(--ink-soft);line-height:1.9;font-weight:400}
.case-metrics{display:flex;gap:28px;margin:20px 0;flex-wrap:wrap}
.case-metrics div b{display:block;font-family:var(--font-serif);font-size:25px;font-weight:700;color:var(--gold-deep)}
.case-metrics div span{font-size:12.5px;color:var(--muted);font-weight:400}
.case-quote{border-left:3px solid var(--gold);padding:8px 0 8px 18px;font-size:14px;color:var(--ink-soft);font-style:normal;line-height:1.85;font-weight:400}

/* ---------- Split / overview ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.split .visual{height:400px;border-radius:var(--radius);position:relative;overflow:hidden;
  background:radial-gradient(600px 400px at 70% 20%,rgba(184,137,62,.16),transparent 60%),linear-gradient(150deg,#eef2f9,#f7fafe);
  display:flex;align-items:center;justify-content:center}
.split .visual .vk{font-family:var(--font-serif);font-size:120px;font-weight:700;color:rgba(13,23,48,.05)!important;position:absolute}
.split .visual .vbadge{text-align:center;padding:30px;position:relative;z-index:2}
.split .visual .vbadge .big{font-family:var(--font-serif);font-size:52px;font-weight:700;color:var(--ink)}
.split .visual .vbadge .small{font-size:14px;color:var(--gold);margin-top:8px;letter-spacing:2px}
.split h2{font-size:32px;font-weight:700;margin-bottom:18px;font-family:var(--font-serif)}
.split p{color:var(--ink-soft);font-size:16px;margin-bottom:14px;line-height:1.95;font-weight:400}
.checklist{display:flex;flex-direction:column;gap:13px;margin-top:22px}
.checklist li{display:flex;gap:13px;align-items:flex-start;font-size:15px;color:var(--ink-soft);font-weight:400}
.checklist li .ck{width:22px;height:22px;border-radius:50%;background:var(--gold-soft);display:flex;align-items:center;justify-content:center;flex:none;margin-top:2px}
.checklist li .ck::after{content:"";width:5px;height:10px;border:solid var(--gold-deep);border-width:0 2px 2px 0;transform:rotate(45deg) translateY(-1px);margin-top:-2px}

/* ---------- Card grid (teasers) ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
/* solutions/index.html 「五大场景」网格：2列→3列（id 作用域，避免影响全局 .card-grid） */
#solGrid{grid-template-columns:repeat(3,1fr)}
@media(max-width:980px){#solGrid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){#solGrid{grid-template-columns:1fr}}
.pcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px 28px;transition:transform .28s,box-shadow .28s;position:relative;overflow:hidden;display:flex;flex-direction:column}
.pcard:hover{transform:translateY(-7px);box-shadow:var(--shadow-lg)}
.pcard::before{content:"";position:absolute;top:0;left:0;width:100%;height:3px;background:var(--gold)}
.pcard .kicker{font-size:12px;font-weight:500;letter-spacing:1.5px;color:var(--gold-deep);margin-bottom:12px}
.pcard h3{font-size:var(--fs-card-title);font-weight:600;margin-bottom:11px;font-family:var(--font-serif)}
.pcard p{font-size:15px;color:var(--muted);line-height:1.8;flex:1;font-weight:400}
.pcard .tags{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0}
.pcard .tag{background:var(--bg-soft2);border-radius:8px;padding:6px 12px;font-size:12.5px;font-weight:400;color:var(--ink-soft)}

/* ---------- CTA band ---------- */
.cta{position:relative;overflow:hidden;border-radius:22px;padding:68px 56px;color:var(--ink);text-align:center;
  background:radial-gradient(600px 360px at 80% -30%,rgba(184,137,62,.18),transparent 60%),linear-gradient(150deg,#eef2f9,#f7fafe)}
.cta::after{content:"";position:absolute;left:-60px;bottom:-80px;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,rgba(184,137,62,.12),transparent 70%)}
.cta h2{font-size:32px;font-weight:700;position:relative;z-index:2;font-family:var(--font-serif);color:var(--ink)}
.cta p{margin:15px auto 30px;max-width:640px;color:var(--ink-soft);font-size:17px;position:relative;z-index:2;font-weight:400}
.cta .hero-cta{justify-content:center;position:relative;z-index:2}

/* ---------- About dark band ---------- */
.about{background:linear-gradient(160deg,#eef2f9,#f7fafe);color:var(--ink);border:1px solid var(--line);border-radius:22px;padding:62px 54px;position:relative;overflow:hidden}
.about::after{content:"";position:absolute;right:-80px;top:-80px;width:320px;height:320px;border-radius:50%;background:radial-gradient(circle,rgba(184,137,62,.14),transparent 70%)}
.about .eyebrow{color:var(--gold)}
.about .eyebrow::before,.about .eyebrow::after{background:var(--gold)}
.about h2{font-size:30px;font-weight:700;max-width:640px;font-family:var(--font-serif)}
.about .mission{font-size:18px;color:var(--ink-soft);margin:18px 0 30px;max-width:690px;line-height:1.9;font-weight:400}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;position:relative;z-index:2}
.about-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-s);padding:26px 24px}
.about-card h4{font-size:16px;font-weight:600;margin-bottom:10px;color:var(--gold);font-family:var(--font-serif)}
.about-card p{font-size:14px;color:var(--ink-soft);line-height:1.85;font-weight:400}

/* ---------- Footer ----------
   说明：页脚版式与视觉已由 nav.js 单一真源（SITE_FOOTER_HTML）+ footer-redesign.css
   全权接管（含 !important 浅色承载）。旧深色页脚定义已整体删除，避免与浅色主题冲突。 */

/* ---------- Product overview value ---------- */
.ovalue{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:36px}
.ovalue .ov{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px;text-align:center}
.ovalue .ov b{display:block;font-family:var(--font-serif);font-size:32px;font-weight:700;color:var(--navy)}
.ovalue .ov span{display:block;margin-top:8px;font-size:14px;color:var(--muted);font-weight:400}

/* ---------- Advantages ---------- */
.advs{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.adv{background:#fff;border:1px solid var(--line);border-left:3px solid var(--gold);border-radius:var(--radius);padding:28px 26px;transition:transform .25s,box-shadow .25s}
.adv:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.adv-top{display:flex;align-items:center;gap:14px;margin-bottom:12px}
.adv-no{font-family:var(--font-serif);font-size:20px;font-weight:700;color:var(--gold-deep);background:var(--gold-soft);width:40px;height:40px;border-radius:11px;display:flex;align-items:center;justify-content:center;flex:none}
.adv h3{font-size:18px;font-weight:600;color:var(--ink);font-family:var(--font-serif)}
.adv p{font-size:15px;color:var(--ink-soft);line-height:1.85;font-weight:400}

/* ---------- Services ---------- */
.svcs{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.svc{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;transition:transform .25s,box-shadow .25s}
.svc:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.svc-ic{color:var(--gold-deep);margin-bottom:14px;display:block}
.svc-ic svg{width:30px;height:30px}
.svc h4{font-size:17px;font-weight:600;margin-bottom:9px;color:var(--navy);font-family:var(--font-serif)}
.svc p{font-size:14px;color:var(--muted);line-height:1.8;font-weight:400}

/* ---------- FAQ ---------- */
.faqs{display:flex;flex-direction:column;gap:14px;max-width:940px;margin:0 auto 56px}
.faq{background:#fff;border:1px solid var(--line);border-radius:var(--radius-s);padding:0 26px;transition:box-shadow .2s}
.faq[open]{box-shadow:var(--shadow)}
/* FAQ 模块标题与首问间距收紧：仅作用于带 faq-section / faq-title 类的特定模块，
   不影响其余 .section、.sec-head 与 .faqs 的默认间距（特异性 0,1,1 高于基础规则，不被级联覆盖） */
section.faq-section{padding-bottom:24px}
.sec-head.faq-title{margin-bottom:18px}
.faq summary{cursor:pointer;list-style:none;padding:22px 0;font-size:17px;font-weight:500;color:var(--ink);display:flex;align-items:center;justify-content:space-between;gap:16px;font-family:var(--font-sans)}
.faq summary::-webkit-details-marker{display:none}
.faq .faq-ic{width:22px;height:22px;flex:none;position:relative}
.faq .faq-ic::before,.faq .faq-ic::after{content:"";position:absolute;background:var(--gold-deep);border-radius:2px;transition:.25s}
.faq .faq-ic::before{top:10px;left:4px;width:14px;height:2px}
.faq .faq-ic::after{top:4px;left:10px;width:2px;height:14px}
.faq[open] .faq-ic::after{transform:rotate(90deg);opacity:0}
.faq-a{padding-top:18px;font-size:15px;color:var(--ink-soft);line-height:1.95;border-top:1px solid var(--line-soft);padding-bottom:24px;font-weight:400}

/* ---------- Related products ---------- */
.rcards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.rcard{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px;transition:transform .25s,box-shadow .25s;display:flex;flex-direction:column}
.rcard:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:var(--gold)}
.rcard h4{font-size:18px;font-weight:600;color:var(--navy);margin-bottom:9px;font-family:var(--font-serif)}
.rcard p{font-size:14px;color:var(--ink-soft);line-height:1.8;flex:1;font-weight:400}

/* ---------- Roles (home) ---------- */
.roles{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.role{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;transition:transform .25s,box-shadow .25s}
.role:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.role .ric{color:var(--navy);margin-bottom:16px}
.role .ric svg{width:34px;height:34px}
.role h3{font-size:18px;font-weight:600;margin-bottom:9px;font-family:var(--font-serif)}
.role p{font-size:14px;color:var(--muted);line-height:1.8;font-weight:400}
.role .rmeta{margin-top:16px;font-size:12.5px;color:var(--gold-deep);font-weight:500;letter-spacing:.5px}

/* ---------- Insights (home + page) ---------- */
.articles{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.article{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .25s,box-shadow .25s;display:flex;flex-direction:column}
.article:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.article .acover{height:160px;display:flex;align-items:flex-end;padding:20px;color:var(--ink);
  background:radial-gradient(500px 300px at 80% 10%,rgba(184,137,62,.16),transparent 60%),linear-gradient(150deg,#eef2f9,#f7fafe)}
.article .acover .acat{font-size:12px;background:var(--gold-soft);padding:5px 12px;border-radius:999px;font-weight:500}
.article .abody{padding:24px 26px;display:flex;flex-direction:column;flex:1}
.article .adate{font-size:12.5px;color:var(--muted);font-weight:400}
.article h4{font-size:18px;font-weight:600;margin:8px 0 10px;font-family:var(--font-serif);line-height:1.45}
.article p{font-size:14px;color:var(--ink-soft);line-height:1.8;font-weight:400;flex:1}

/* ---------- Reveal ---------- */
.reveal{opacity:0.55;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
/* 无 JS 降级：脚本失败时 .reveal 仍完整可见（P2-7） */
.no-js .reveal{opacity:1!important;transform:none!important}

/* ---------- 卡片悬停（统一克制的微抬升 + 层次阴影） ---------- */
.feature:hover,.pcard:hover,.rcard:hover,.article:hover,.role:hover,.scenario:hover,
.case:hover,.cert:hover,.svc:hover,.adv:hover,.res:hover,.dl-card:hover,.logo-cell:hover,
.award:hover,.step:hover,.tier:hover,.caseidx:hover{
  transform:translateY(-4px);box-shadow:var(--shadow-card-hover)}
.tier.feat{box-shadow:var(--shadow-card-hover)}

/* ---------- Responsive ---------- */
@media (max-width:1024px){
  .features,.card-grid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:34px}
}
@media (max-width:820px){
  .section{padding:72px 0}
  .sec-head h2{font-size:28px}
  .features,.card-grid,.scenarios,.cases,.stats,.about-grid,.foot-cols,.ovalue,.advs,.svcs,.rcards,.roles,.articles{grid-template-columns:1fr}
  .foot-top{grid-template-columns:1fr;gap:30px}
  .foot-brand{grid-column:auto}
  .foot-cols{grid-column:auto;grid-template-columns:repeat(2,1fr);gap:24px}
  .cta{padding:46px 26px}
  .about{padding:42px 26px}
  .hero{padding:84px 0 72px}
}
@media (max-width:520px){
  .foot-cols{grid-template-columns:1fr}
}