/* ============================================================
   WOSSCI 沃思科研 — Design System
   Palette: Springer Blue × Elsevier Orange · Tech / Contemporary
   ============================================================ */

:root{
  /* Springer blue family */
  --navy-950:#021a33;
  --navy-900:#04254a;
  --navy-800:#00305e;
  --navy-700:#084b8a;
  --blue-600:#0769aa;
  --blue-500:#1779c4;
  --blue-400:#3a97df;
  --blue-100:#dcecf9;
  --blue-50:#eef5fc;
  /* Elsevier orange family */
  --orange-600:#e9711c;
  --orange-500:#ff6c00;
  --orange-400:#ff8a33;
  --orange-100:#ffe8d6;
  --orange-50:#fff4ec;
  /* Neutrals */
  --ink:#11253a;
  --ink-soft:#41566e;
  --ink-mute:#6b7f94;
  --line:#dde7f0;
  --bg:#ffffff;
  --bg-soft:#f4f8fc;
  /* Gradients */
  --g-hero:linear-gradient(135deg,#021a33 0%,#00305e 45%,#0a5ca0 100%);
  --g-blue:linear-gradient(120deg,#00305e,#0769aa);
  --g-orange:linear-gradient(120deg,#ff6c00,#ff8a33);
  --g-text:linear-gradient(95deg,#ffb37a,#ff6c00 55%,#ff8a33);
  --g-text-blue:linear-gradient(95deg,#0769aa,#00305e);
  --g-card:linear-gradient(180deg,#ffffff,#f6faff);
  /* Effects */
  --shadow-sm:0 1px 2px rgba(2,26,51,.06),0 2px 8px rgba(2,26,51,.05);
  --shadow-md:0 4px 14px rgba(2,26,51,.08),0 12px 32px rgba(2,26,51,.08);
  --shadow-lg:0 12px 28px rgba(2,26,51,.14),0 32px 64px rgba(2,26,51,.12);
  --shadow-orange:0 8px 24px rgba(255,108,0,.32);
  --radius:16px;
  --radius-lg:24px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --header-h:72px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:0;background:none}
::selection{background:var(--orange-100);color:var(--navy-800)}

.container{width:min(1180px,92%);margin-inline:auto}

/* ---------- Typography ---------- */
h1,h2,h3,h4{line-height:1.3;font-weight:700;color:var(--navy-800)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--blue-600)}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--g-orange);border-radius:2px}
.section-head{max-width:760px;margin-bottom:48px}
.section-head.center{margin-inline:auto;text-align:center}
.section-head.center .eyebrow{justify-content:center}
.section-head.center .eyebrow::after{content:"";width:26px;height:2px;background:var(--g-orange);border-radius:2px}
.section-head h2{font-size:clamp(26px,3.2vw,38px);margin:14px 0 14px;letter-spacing:-.01em}
.section-head p{color:var(--ink-soft);font-size:17px}
.grad-text{background:var(--g-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.grad-text-blue{background:var(--g-text-blue);-webkit-background-clip:text;background-clip:text;color:transparent}

section{padding:88px 0}
section.tight{padding:64px 0}
.bg-soft{background:var(--bg-soft)}
.bg-grid{position:relative}
.bg-grid::before{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(7,105,170,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(7,105,170,.05) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 30%,transparent 75%);
          mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 30%,transparent 75%)}
.bg-grid>*{position:relative}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:600;font-size:15.5px;
  padding:14px 30px;border-radius:999px;transition:transform .2s ease,box-shadow .2s ease,background .2s ease;white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--g-orange);color:#fff;box-shadow:var(--shadow-orange)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(255,108,0,.42)}
.btn-blue{background:var(--g-blue);color:#fff;box-shadow:0 8px 22px rgba(7,105,170,.32)}
.btn-blue:hover{transform:translateY(-2px)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.45);color:#fff;backdrop-filter:blur(4px)}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.1)}
.btn-ghost-dark{border:1.5px solid var(--blue-600);color:var(--blue-600)}
.btn-ghost-dark:hover{background:var(--blue-50)}
.btn .arr{transition:transform .2s}
.btn:hover .arr{transform:translateX(3px)}
.btn-sm{padding:10px 22px;font-size:14px}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:100;height:var(--header-h);
  background:rgba(255,255,255,.82);backdrop-filter:blur(16px) saturate(1.4);-webkit-backdrop-filter:blur(16px) saturate(1.4);
  border-bottom:1px solid rgba(221,231,240,.7);transition:box-shadow .25s}
.site-header.scrolled{box-shadow:var(--shadow-sm)}
.header-in{height:var(--header-h);display:flex;align-items:center;gap:36px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand .logo-mark{width:40px;height:40px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text .cn{font-size:18px;font-weight:800;color:var(--navy-800);letter-spacing:.06em}
.brand-text .en{font-size:10.5px;font-weight:700;letter-spacing:.32em;color:var(--orange-500)}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-item{position:relative}
.nav-link{display:flex;align-items:center;gap:5px;padding:10px 15px;font-size:15px;font-weight:600;color:var(--ink-soft);border-radius:10px;transition:color .2s,background .2s}
.nav-link:hover{color:var(--blue-600);background:var(--blue-50)}
.nav-link .caret{width:9px;height:9px;border-right:1.7px solid currentColor;border-bottom:1.7px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform .2s;margin-left:2px}
.nav-item:hover .caret,.nav-item:focus-within .caret{transform:rotate(225deg) translateY(-1px)}
.dropdown{position:absolute;top:calc(100% + 10px);left:50%;transform:translate(-50%,8px);min-width:280px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-lg);
  padding:10px;opacity:0;visibility:hidden;transition:opacity .22s,transform .22s,visibility .22s}
.nav-item:hover .dropdown,.nav-item:focus-within .dropdown{opacity:1;visibility:visible;transform:translate(-50%,0)}
.dropdown::before{content:"";position:absolute;top:-10px;left:0;right:0;height:10px}
.dropdown a{display:flex;flex-direction:column;gap:1px;padding:11px 14px;border-radius:11px;transition:background .15s}
.dropdown a:hover{background:var(--blue-50)}
.dropdown a .t{font-size:14.5px;font-weight:600;color:var(--navy-800)}
.dropdown a:hover .t{color:var(--blue-600)}
.dropdown a .d{font-size:12.5px;color:var(--ink-mute)}
.header-cta{margin-left:8px}
.nav-toggle{display:none;width:44px;height:44px;border-radius:10px;position:relative;margin-left:auto}
.nav-toggle span{position:absolute;left:11px;right:11px;height:2px;background:var(--navy-800);border-radius:2px;transition:.25s}
.nav-toggle span:nth-child(1){top:15px}.nav-toggle span:nth-child(2){top:21px}.nav-toggle span:nth-child(3){top:27px}
.nav-open .nav-toggle span:nth-child(1){top:21px;transform:rotate(45deg)}
.nav-open .nav-toggle span:nth-child(2){opacity:0}
.nav-open .nav-toggle span:nth-child(3){top:21px;transform:rotate(-45deg)}

/* ---------- Hero (homepage) ---------- */
.hero{position:relative;overflow:hidden;background:var(--g-hero);color:#fff;padding:110px 0 120px}
.hero::before{content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:radial-gradient(ellipse 80% 80% at 60% 20%,#000 20%,transparent 70%);
          mask-image:radial-gradient(ellipse 80% 80% at 60% 20%,#000 20%,transparent 70%)}
.hero .glow{position:absolute;border-radius:50%;filter:blur(90px);pointer-events:none}
.hero .glow.g1{width:560px;height:560px;right:-140px;top:-180px;background:radial-gradient(circle,rgba(23,121,196,.55),transparent 65%)}
.hero .glow.g2{width:460px;height:460px;left:-160px;bottom:-220px;background:radial-gradient(circle,rgba(255,108,0,.28),transparent 65%)}
.hero-in{position:relative;text-align:center;max-width:880px;margin-inline:auto}
.hero-tag{display:inline-flex;align-items:center;gap:8px;padding:8px 18px;border-radius:999px;font-size:13.5px;font-weight:600;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);backdrop-filter:blur(6px);margin-bottom:28px}
.hero-tag .dot{width:7px;height:7px;border-radius:50%;background:var(--orange-400);box-shadow:0 0 10px var(--orange-400)}
.hero h1{color:#fff;font-size:clamp(32px,5vw,56px);letter-spacing:.01em;margin-bottom:10px}
.hero .h1-sub{font-size:clamp(24px,3.6vw,40px);font-weight:800;margin-bottom:26px}
.hero p.lead{color:rgba(235,243,250,.85);font-size:17.5px;max-width:640px;margin:0 auto 34px}
.hero-badges{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:40px}
.hero-badges span{font-size:13px;font-weight:600;padding:7px 15px;border-radius:999px;color:#dcecf9;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.15)}
.hero-badges span b{color:var(--orange-400);font-weight:700}
.hero-ctas{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
.hero-stats{position:relative;display:flex;justify-content:center;gap:clamp(28px,6vw,72px);margin-top:64px;flex-wrap:wrap}
.hero-stats .stat{text-align:center}
.hero-stats .num{font-size:clamp(26px,3vw,36px);font-weight:800;background:var(--g-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stats .lbl{font-size:13px;color:rgba(220,236,249,.75);margin-top:2px}

/* ---------- Page hero (landing pages) ---------- */
.page-hero{position:relative;overflow:hidden;background:var(--g-hero);color:#fff;padding:84px 0 88px}
.page-hero::before{content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:radial-gradient(ellipse 85% 90% at 70% 10%,#000 20%,transparent 72%);
          mask-image:radial-gradient(ellipse 85% 90% at 70% 10%,#000 20%,transparent 72%)}
.page-hero .glow{position:absolute;border-radius:50%;filter:blur(90px);pointer-events:none}
.page-hero .glow.g1{width:480px;height:480px;right:-120px;top:-160px;background:radial-gradient(circle,rgba(23,121,196,.5),transparent 65%)}
.page-hero .glow.g2{width:380px;height:380px;left:-120px;bottom:-200px;background:radial-gradient(circle,rgba(255,108,0,.26),transparent 65%)}
.page-hero-in{position:relative;max-width:840px}
.crumbs{display:flex;flex-wrap:wrap;gap:7px;font-size:13px;color:rgba(220,236,249,.7);margin-bottom:24px}
.crumbs a:hover{color:#fff}
.crumbs .sep{opacity:.5}
.page-hero .svc-tag{display:inline-flex;align-items:center;gap:8px;padding:7px 16px;border-radius:999px;font-size:13px;font-weight:600;
  background:rgba(255,108,0,.14);border:1px solid rgba(255,138,51,.35);color:#ffc599;margin-bottom:20px}
.page-hero h1{color:#fff;font-size:clamp(28px,3.8vw,44px);margin-bottom:18px;letter-spacing:-.01em}
.page-hero h1 em{font-style:normal;background:var(--g-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.page-hero p.lead{color:rgba(235,243,250,.85);font-size:17px;max-width:680px;margin-bottom:14px}
.page-hero p.hook{font-size:14.5px;color:rgba(220,236,249,.62);font-style:italic;border-left:3px solid var(--orange-500);padding-left:14px;max-width:640px;margin-bottom:30px}
.page-hero .hero-badges{justify-content:flex-start;margin-bottom:34px}
.page-hero .hero-ctas{justify-content:flex-start}

/* ---------- Cards ---------- */
.grid{display:grid;gap:24px}
.grid.c2{grid-template-columns:repeat(2,1fr)}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.grid.c4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--g-card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px 28px;
  position:relative;overflow:hidden;transition:transform .25s ease,box-shadow .25s ease,border-color .25s}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:var(--blue-100)}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--g-orange);opacity:0;transition:opacity .25s}
.card:hover::before{opacity:1}
.card .icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;margin-bottom:20px;
  background:var(--g-blue);color:#fff;box-shadow:0 6px 16px rgba(7,105,170,.25)}
.card .icon.orange{background:var(--g-orange);box-shadow:0 6px 16px rgba(255,108,0,.25)}
.card .icon svg{width:26px;height:26px}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--ink-soft);font-size:14.8px}
.card .tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.card .tags span{font-size:12.5px;font-weight:600;color:var(--blue-600);background:var(--blue-50);border:1px solid var(--blue-100);padding:4px 12px;border-radius:999px}
.card .more{display:inline-flex;align-items:center;gap:6px;margin-top:18px;font-size:14px;font-weight:600;color:var(--orange-600)}
.card .more:hover{gap:10px}
.card ul.feats{margin-top:14px;display:grid;gap:8px}
.card ul.feats li{position:relative;padding-left:24px;font-size:14.5px;color:var(--ink-soft)}
.card ul.feats li::before{content:"";position:absolute;left:0;top:7px;width:14px;height:8px;border-left:2.2px solid var(--orange-500);border-bottom:2.2px solid var(--orange-500);transform:rotate(-45deg)}

/* numbered feature list card */
.num-card{counter-increment:numcard;position:relative;padding-left:76px}
.num-card .num{position:absolute;left:24px;top:30px;width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:16px;color:#fff;background:var(--g-blue)}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:step}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px 24px;transition:transform .25s,box-shadow .25s}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.step .n{width:42px;height:42px;border-radius:50%;background:var(--g-orange);color:#fff;font-weight:800;font-size:17px;
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;box-shadow:0 6px 14px rgba(255,108,0,.3)}
.step h3{font-size:17px;margin-bottom:8px}
.step p{font-size:14px;color:var(--ink-soft)}
.step::after{content:"";position:absolute;top:50px;right:-22px;width:22px;border-top:2px dashed var(--blue-100)}
.step:last-child::after{display:none}
.steps.c5{grid-template-columns:repeat(5,1fr)}
.steps.c6{grid-template-columns:repeat(3,1fr)}
.steps.c6 .step::after{display:none}

/* ---------- Tables ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);background:#fff}
table.tbl{width:100%;border-collapse:collapse;font-size:14.5px;min-width:640px}
table.tbl th{background:var(--g-blue);color:#fff;font-weight:700;text-align:left;padding:15px 18px;font-size:14px;letter-spacing:.02em}
table.tbl td{padding:14px 18px;border-top:1px solid var(--line);color:var(--ink-soft);vertical-align:top}
table.tbl tr:nth-child(even) td{background:var(--bg-soft)}
table.tbl td:first-child{font-weight:650;color:var(--navy-800)}
table.tbl .ok{color:#0e8a4d;font-weight:700}
table.tbl .no{color:#c4cfdb;font-weight:700}

/* ---------- Before / After ---------- */
.ba{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm)}
.ba+.ba{margin-top:22px}
.ba .ba-head{padding:16px 24px;font-weight:700;font-size:15.5px;color:var(--navy-800);background:var(--blue-50);border-bottom:1px solid var(--line)}
.ba .cols{display:grid;grid-template-columns:1fr 1fr}
.ba .col{padding:22px 24px}
.ba .col+.col{border-left:1px solid var(--line)}
.ba .lab{display:inline-block;font-size:11.5px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;padding:3px 11px;border-radius:999px;margin-bottom:12px}
.ba .col.before .lab{background:#fdecec;color:#c0392b}
.ba .col.after .lab{background:#e8f7ef;color:#0e8a4d}
.ba .col p{font-size:14.5px;color:var(--ink-soft);font-family:Georgia,"Times New Roman",serif}
.ba .note{padding:14px 24px;font-size:13.5px;color:var(--ink-mute);background:var(--bg-soft);border-top:1px solid var(--line)}
.ba .note b{color:var(--orange-600)}

/* ---------- FAQ (always expanded — per revision note #12) ---------- */
.faq-list{display:grid;gap:18px;max-width:880px;margin-inline:auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px 30px;box-shadow:var(--shadow-sm)}
.faq-item .q{display:flex;gap:14px;align-items:flex-start;font-weight:700;font-size:16.5px;color:var(--navy-800);margin-bottom:10px}
.faq-item .q::before{content:"Q";flex-shrink:0;width:28px;height:28px;border-radius:8px;background:var(--g-blue);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:800;margin-top:2px}
.faq-item .a{display:flex;gap:14px;color:var(--ink-soft);font-size:15px}
.faq-item .a::before{content:"A";flex-shrink:0;width:28px;height:28px;border-radius:8px;background:var(--g-orange);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:800;margin-top:2px}

/* ---------- Checklist split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.checks{display:grid;gap:14px}
.checks li{display:flex;gap:13px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 18px;font-size:15px;color:var(--ink-soft);transition:transform .2s,box-shadow .2s}
.checks li:hover{transform:translateX(4px);box-shadow:var(--shadow-sm)}
.checks li::before{content:"";flex-shrink:0;width:22px;height:22px;margin-top:3px;border-radius:50%;
  background:var(--g-orange);
  -webkit-mask:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path fill="black" d="M12 0a12 12 0 1 0 12 12A12 12 0 0 0 12 0zm-1.2 17.4-5-5 1.7-1.7 3.3 3.3 6.7-6.7 1.7 1.7z"/></svg>') center/contain no-repeat;
          mask:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path fill="black" d="M12 0a12 12 0 1 0 12 12A12 12 0 0 0 12 0zm-1.2 17.4-5-5 1.7-1.7 3.3 3.3 6.7-6.7 1.7 1.7z"/></svg>') center/contain no-repeat}
.checks li b{color:var(--navy-800)}

/* ---------- Resource cards ---------- */
.res-card{text-align:center;padding:40px 28px}
.res-card .icon{margin-inline:auto}
.res-card .btn{margin-top:20px}

/* ---------- QR community ---------- */
.community{background:var(--navy-900);border-radius:var(--radius-lg);overflow:hidden;position:relative;color:#fff;padding:56px;display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:center}
.community::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:40px 40px;
  -webkit-mask-image:radial-gradient(ellipse at 80% 50%,#000,transparent 70%);mask-image:radial-gradient(ellipse at 80% 50%,#000,transparent 70%)}
.community>*{position:relative}
.community h2{color:#fff;font-size:clamp(24px,3vw,32px);margin-bottom:14px}
.community p{color:rgba(220,236,249,.8);font-size:15.5px;margin-bottom:22px}
.community .checks li{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.12);color:rgba(235,243,250,.9)}
.community .checks li:hover{box-shadow:none}
.qr-row{display:flex;gap:24px;justify-content:center}
.qr-box{background:#fff;border-radius:18px;padding:16px;text-align:center;width:170px;box-shadow:var(--shadow-lg)}
.qr-box img{width:138px;height:138px;border-radius:8px;object-fit:contain;background:#f3f6fa}
.qr-box .cap{font-size:13px;font-weight:700;color:var(--navy-800);margin-top:10px}
.qr-box .sub{font-size:11.5px;color:var(--ink-mute)}

/* ---------- CTA band ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--g-hero);border-radius:var(--radius-lg);padding:64px 56px;color:#fff;text-align:center}
.cta-band::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:42px 42px;
  -webkit-mask-image:radial-gradient(ellipse at 50% 0%,#000,transparent 75%);mask-image:radial-gradient(ellipse at 50% 0%,#000,transparent 75%)}
.cta-band .glow{position:absolute;width:420px;height:420px;border-radius:50%;filter:blur(80px);background:radial-gradient(circle,rgba(255,108,0,.3),transparent 65%);right:-100px;bottom:-220px}
.cta-band>*{position:relative}
.cta-band h2{color:#fff;font-size:clamp(24px,3.4vw,36px);margin-bottom:14px}
.cta-band p{color:rgba(235,243,250,.82);max-width:620px;margin:0 auto 30px;font-size:16px}
.cta-band .fine{font-size:13px;color:rgba(220,236,249,.6);margin-top:22px}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy-950);color:#b9cbdd;padding:72px 0 0;margin-top:96px;position:relative;overflow:hidden}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--blue-600),var(--orange-500))}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:48px;padding-bottom:48px}
.footer-brand .brand-text .cn{color:#fff}
.footer-brand p{font-size:13.5px;color:#8aa3bc;margin:18px 0 20px;max-width:300px}
.footer-contact{display:grid;gap:9px;font-size:13.5px}
.footer-contact a:hover{color:#fff}
.footer-contact .k{color:#6f8aa6;margin-right:6px}
.footer-col h4{color:#fff;font-size:14.5px;letter-spacing:.04em;margin-bottom:18px}
.footer-col ul{display:grid;gap:11px}
.footer-col a{font-size:13.5px;color:#9db3c9;transition:color .15s}
.footer-col a:hover{color:var(--orange-400)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:22px 0;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;font-size:12.5px;color:#6f8aa6}
.footer-bottom .links{display:flex;gap:22px}
.footer-bottom a:hover{color:#fff}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ---------- Legal pages ---------- */
.legal-body{max-width:820px;margin-inline:auto;padding:64px 0 32px}
.legal-body h2{font-size:21px;margin:36px 0 12px}
.legal-body p,.legal-body li{color:var(--ink-soft);font-size:15px;margin-bottom:10px}
.legal-body ul{list-style:disc;padding-left:22px}
.legal-meta{font-size:13px;color:var(--ink-mute)}

/* ---------- Responsive ---------- */
@media (max-width:1024px){
  .grid.c4{grid-template-columns:repeat(2,1fr)}
  .grid.c3{grid-template-columns:repeat(2,1fr)}
  .steps,.steps.c5{grid-template-columns:repeat(2,1fr)}
  .step::after{display:none}
  .footer-grid{grid-template-columns:1fr 1fr}
  .community{grid-template-columns:1fr;padding:44px 32px}
  .split{grid-template-columns:1fr;gap:32px}
}
@media (max-width:760px){
  section{padding:64px 0}
  .grid.c2,.grid.c3,.grid.c4{grid-template-columns:1fr}
  .steps,.steps.c5,.steps.c6{grid-template-columns:1fr}
  .ba .cols{grid-template-columns:1fr}
  .ba .col+.col{border-left:0;border-top:1px solid var(--line)}
  .hero{padding:80px 0 88px}
  .cta-band{padding:48px 24px}
  .qr-row{flex-wrap:wrap}
  /* mobile nav */
  .nav-toggle{display:block}
  .main-nav{position:fixed;top:var(--header-h);left:0;right:0;bottom:0;background:#fff;flex-direction:column;align-items:stretch;
    padding:18px 6vw 40px;gap:2px;overflow-y:auto;transform:translateX(100%);transition:transform .3s ease;margin-left:0;display:flex}
  .nav-open .main-nav{transform:none}
  .nav-link{justify-content:space-between;padding:15px 8px;font-size:16px;border-bottom:1px solid var(--line);border-radius:0}
  .dropdown{position:static;transform:none;opacity:1;visibility:visible;min-width:0;border:0;box-shadow:none;padding:0 0 8px 14px;display:none}
  .nav-item.open .dropdown{display:block}
  .header-cta{margin:18px 0 0}
  .footer-grid{grid-template-columns:1fr}
}