/* ============================================================
   Vineyard TOEFL+ · 首页样式 (home.css)
   从 index.html 内联 CSS 拆出，可被浏览器缓存。
   ============================================================ */
:root{
  --primary:#4A38D4;--primary-dark:#2E1F9E;--primary-soft:#E8E5FB;--primary-tint:#F4F2FE;
  --accent-gold:#C7894A;--accent-warm:#D9A04E;
  --ink:#1A1A2E;--ink-soft:#3A3A4E;--ink-muted:#6B6B7E;--ink-faint:#9A95A8;
  --paper:#FDF8F0;--bg-lavender:#EFEBF7;--success:#1F9D55;--warn:#D9A04E;--danger:#D04545;
  --font-display:'Fraunces','Microsoft YaHei','微软雅黑',Georgia,serif;
  --font-body:'Crimson Pro','Microsoft YaHei','微软雅黑',Georgia,serif;
  --font-zh:'Microsoft YaHei','微软雅黑','PingFang SC','Hiragino Sans GB',sans-serif;
  --font-ui:'Manrope','Microsoft YaHei','微软雅黑',-apple-system,'PingFang SC',system-ui,sans-serif;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family:var(--font-ui);color:var(--ink);background:var(--bg-lavender);
  background-image:
    radial-gradient(at 18% 8%, rgba(232,229,251,.85) 0%, transparent 55%),
    radial-gradient(at 82% 92%, rgba(255,240,220,.55) 0%, transparent 50%),
    radial-gradient(at 50% 50%, rgba(245,240,252,.6) 0%, transparent 70%);
  background-attachment:fixed;min-height:100vh;-webkit-font-smoothing:antialiased;
}
em{font-style:italic;}
/* ===== NAV ===== */
.nav{position:sticky;top:0;z-index:100;background:rgba(245,242,252,.85);backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid rgba(74,56,212,.08);padding:14px 48px;display:flex;align-items:center;gap:20px;}
.brand-logo{width:40px;height:40px;flex-shrink:0;display:block;border-radius:50%;user-select:none;-webkit-user-drag:none;}
.brand-en{font-family:var(--font-display);font-size:22px;font-weight:500;letter-spacing:-.01em;color:var(--ink);cursor:pointer;font-variation-settings:"opsz" 22;}
.brand-en a{color:inherit;text-decoration:none;}
.brand-en em{font-style:italic;color:var(--primary);}
.brand-sep{width:1px;height:24px;background:rgba(74,56,212,.25);}
.brand-zh{font-family:var(--font-zh);font-size:15px;color:var(--ink-soft);font-weight:600;letter-spacing:.02em;}
.nav-tabs{margin-left:auto;display:flex;align-items:center;gap:6px;}
.nav-tab{font-family:var(--font-ui);font-size:13px;letter-spacing:.02em;color:var(--ink-soft);padding:8px 14px;border-radius:999px;cursor:pointer;transition:all .2s;text-decoration:none;background:transparent;}
.nav-tab:hover{background:rgba(74,56,212,.08);color:var(--primary);}
.nav-tab.active{background:var(--primary);color:#fff;}
.nav-item{position:relative;display:inline-flex;align-items:center;}
.nav-caret{font-size:9px;margin-left:3px;opacity:.55;display:inline-block;transform:translateY(-1px);transition:transform .2s;}
.nav-item:hover .nav-caret{transform:translateY(-1px) rotate(180deg);}
.nav-dropdown{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(4px);background:rgba(255,255,255,.98);backdrop-filter:blur(14px);border:1px solid rgba(74,56,212,.12);border-radius:14px;padding:8px;min-width:250px;box-shadow:0 12px 36px -8px rgba(74,56,212,.22),0 4px 12px rgba(26,26,46,.06);opacity:0;visibility:hidden;transition:opacity .18s ease,transform .18s ease,visibility .18s;z-index:1000;margin-top:6px;}
.nav-dropdown::before{content:'';position:absolute;top:-10px;left:0;right:0;height:12px;background:transparent;}
.nav-item:hover .nav-dropdown{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0);}
.nav-dd-item{display:grid;grid-template-columns:74px 1fr;align-items:center;gap:12px;padding:10px 14px;border-radius:10px;text-decoration:none;color:var(--ink-soft);font-family:var(--font-ui);transition:background .15s,color .15s;}
.nav-dd-item:hover{background:var(--primary-soft);color:var(--primary);}
.nav-dd-item .dd-zh{font-family:var(--font-zh);font-size:14px;font-weight:500;white-space:nowrap;}
.nav-dd-item .dd-en{font-size:11px;color:var(--ink-faint);letter-spacing:.02em;font-style:italic;font-family:var(--font-display);text-align:left;}
.nav-dd-item:hover .dd-en{color:var(--primary);opacity:.75;}
.user-pill{display:flex;align-items:center;gap:10px;padding:6px 14px 6px 6px;background:rgba(255,255,255,.55);border:1px solid rgba(74,56,212,.12);border-radius:999px;font-size:13px;color:var(--ink-soft);margin-left:12px;font-family:var(--font-zh);}
.user-avatar{width:26px;height:26px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent-warm));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:12px;}
.logout-btn{background:transparent;border:none;color:var(--ink-faint);font-size:11px;cursor:pointer;padding:2px 4px;letter-spacing:.06em;}
.logout-btn:hover{color:var(--danger);}
/* ===== LOGIN ===== */
.login-overlay{position:fixed;inset:0;background:var(--bg-lavender);background-image:radial-gradient(at 18% 8%,rgba(232,229,251,.85) 0%,transparent 55%),radial-gradient(at 82% 92%,rgba(255,240,220,.55) 0%,transparent 50%),radial-gradient(at 50% 50%,rgba(245,240,252,.6) 0%,transparent 70%);display:flex;align-items:center;justify-content:center;z-index:200;padding:24px;}
body.authed .login-overlay{display:none;}
.login-card{width:100%;max-width:440px;background:rgba(255,255,255,.55);border:1px solid rgba(74,56,212,.14);border-radius:22px;padding:48px 44px 44px;backdrop-filter:blur(8px);text-align:center;}
.login-logo{width:64px;height:64px;display:block;margin:0 auto 22px;border-radius:50%;box-shadow:0 6px 24px -8px rgba(74,56,212,.45);}
.login-divider{width:64px;height:3px;margin:0 auto 22px;background:linear-gradient(90deg,var(--primary) 0%,var(--primary) 50%,var(--accent-warm) 100%);border-radius:2px;}
.login-eyebrow{font-size:11px;font-weight:600;letter-spacing:.22em;text-transform:uppercase;color:var(--primary);margin-bottom:18px;}
.login-eyebrow .zh{letter-spacing:.1em;font-family:var(--font-zh);font-weight:500;}
.login-title{font-family:var(--font-display);font-size:34px;font-weight:400;letter-spacing:-.02em;line-height:1.15;color:var(--ink);margin:0 0 14px;font-variation-settings:"opsz" 80;}
.login-title em{font-style:italic;color:var(--primary);font-variation-settings:"opsz" 144;}
.login-tag{font-family:var(--font-zh);font-size:14px;line-height:1.75;color:var(--ink-muted);margin-bottom:28px;}
.login-input{width:100%;padding:14px 18px;font-family:var(--font-ui);font-size:15px;border:1.5px solid rgba(74,56,212,.14);border-radius:12px;background:#fff;color:var(--ink);outline:none;transition:border-color .2s,box-shadow .2s;margin-bottom:10px;}
.login-input:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(74,56,212,.1);}
.login-feedback{min-height:28px;margin:0 0 10px;padding:0 4px;display:flex;align-items:center;justify-content:center;gap:8px;font-family:var(--font-zh);font-size:12.5px;line-height:1.5;color:transparent;opacity:0;transform:translateY(-3px);transition:opacity .18s ease,transform .18s ease,color .18s ease;}
.login-feedback::before{content:'';width:7px;height:7px;border-radius:50%;background:currentColor;box-shadow:0 0 0 4px rgba(74,56,212,.09);flex:none;}
.login-feedback.show{opacity:1;transform:translateY(0);color:var(--primary);}
.login-feedback.error{color:var(--danger);}
.login-feedback.error::before{box-shadow:0 0 0 4px rgba(208,69,69,.1);}
.login-btn{width:100%;padding:14px;background:var(--primary);color:#fff;border:none;border-radius:12px;font-family:var(--font-ui);font-size:14px;font-weight:600;letter-spacing:.04em;cursor:pointer;transition:background .2s,transform .15s;}
.login-btn:hover{background:var(--primary-dark);}
.login-btn:active{transform:scale(.98);}
/* ===== HERO ===== */
.hero{padding:66px 48px 26px;text-align:center;max-width:1100px;margin:0 auto;position:relative;}
.hero-divider{width:64px;height:3px;margin:0 auto 22px;background:linear-gradient(90deg,var(--primary) 0%,var(--primary) 50%,var(--accent-warm) 100%);border-radius:2px;animation:rise .8s ease-out both;}
.hero-eyebrow{font-size:12px;font-weight:600;letter-spacing:.22em;text-transform:uppercase;color:var(--primary);margin-bottom:22px;animation:rise .8s ease-out .1s both;}
.hero-eyebrow .dot{margin:0 8px;color:var(--ink-faint);}
.hero-eyebrow .zh{font-family:var(--font-zh);letter-spacing:.1em;}
.hero-title{font-family:var(--font-display);font-size:clamp(38px,5.2vw,58px);font-weight:400;letter-spacing:-.025em;line-height:1.08;color:var(--ink);margin:0 0 22px;font-variation-settings:"opsz" 144;animation:rise .9s ease-out .2s both;}
.hero-title em{font-style:italic;color:var(--primary);}
.hero-sub{font-family:var(--font-zh);font-size:17px;line-height:1.85;color:var(--ink-soft);max-width:660px;margin:0 auto;animation:rise .9s ease-out .35s both;}
/* ===== SECTION / STATS ===== */
.section{max-width:1100px;margin:0 auto;padding:0 48px;}
.stats-bar{display:grid;grid-template-columns:repeat(4,1fr);background:rgba(255,255,255,.45);border:1px solid rgba(74,56,212,.12);border-radius:22px;backdrop-filter:blur(8px);padding:26px 36px;margin:36px auto 14px;animation:rise .9s ease-out .4s both;}
.stat-item{position:relative;text-align:center;padding:0 16px;}
.stat-item+.stat-item::before{content:'';position:absolute;left:0;top:12%;bottom:12%;width:1px;background:rgba(74,56,212,.12);}
.stat-num{font-family:var(--font-display);font-size:38px;color:var(--primary);font-weight:500;line-height:1;font-variation-settings:"opsz" 144;}
.stat-num .unit{font-size:18px;color:var(--ink-muted);font-weight:400;margin-left:2px;}
.stat-label{margin-top:6px;font-family:var(--font-zh);font-size:12.5px;color:var(--ink-muted);letter-spacing:.02em;}
.stats-note{text-align:center;font-family:var(--font-zh);font-size:12px;color:var(--ink-faint);margin:0 auto 30px;letter-spacing:.02em;}
/* ===== HUB GRID ===== */
.hub-head{display:flex;align-items:baseline;gap:14px;max-width:1100px;margin:30px auto 16px;padding:0 48px;}
.hub-head .zh{font-family:var(--font-zh);font-size:15px;font-weight:600;color:var(--ink);}
.hub-head .en{font-family:var(--font-display);font-style:italic;font-size:14px;color:var(--ink-faint);}
.hub-head .rule{flex:1;height:1px;background:rgba(74,56,212,.12);}
.hub-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;padding-bottom:24px;}
.hub-card{background:rgba(255,255,255,.55);border:1px solid rgba(74,56,212,.12);border-radius:22px;padding:34px 30px 28px;min-height:208px;backdrop-filter:blur(8px);transition:all .35s cubic-bezier(.2,.8,.2,1);text-decoration:none;color:inherit;display:flex;flex-direction:column;position:relative;overflow:hidden;}
.hub-card::after{content:'';position:absolute;left:0;top:0;height:3px;width:0;background:linear-gradient(90deg,var(--primary),var(--accent-warm));transition:width .4s cubic-bezier(.2,.8,.2,1);}
.hub-card:hover{transform:translateY(-4px);border-color:rgba(74,56,212,.3);box-shadow:0 18px 40px -16px rgba(74,56,212,.22);background:rgba(255,255,255,.8);}
.hub-card:hover::after{width:100%;}
.hub-card.disabled{opacity:.58;pointer-events:none;}
.hub-card-eyebrow{font-size:11px;font-weight:600;letter-spacing:.22em;text-transform:uppercase;color:var(--ink-faint);margin-bottom:13px;}
.hub-card-title{font-family:var(--font-zh);font-weight:700;font-size:26px;letter-spacing:-.01em;color:var(--ink);margin:0 0 4px;}
.hub-card-en{font-family:var(--font-display);font-style:italic;font-size:18px;color:var(--ink-soft);margin-bottom:16px;font-variation-settings:"opsz" 80;}
.hub-card-meta{font-family:var(--font-zh);font-size:13px;line-height:1.7;color:var(--ink-muted);margin-top:auto;max-width:84%;}
.hub-card-arrow{position:absolute;bottom:24px;right:24px;width:38px;height:38px;border-radius:50%;border:1.5px solid rgba(74,56,212,.25);display:flex;align-items:center;justify-content:center;color:var(--primary);transition:all .3s;}
.hub-card:hover .hub-card-arrow{background:var(--primary);color:#fff;border-color:var(--primary);transform:scale(1.06);}
.hub-card-coming{position:absolute;top:18px;right:18px;padding:4px 10px;background:rgba(217,160,78,.15);color:var(--accent-gold);border-radius:999px;font-size:10px;font-weight:600;letter-spacing:.1em;}
.hub-card-open{position:absolute;top:18px;right:18px;padding:4px 10px;background:rgba(31,157,85,.12);color:var(--success);border-radius:999px;font-size:10px;font-weight:600;letter-spacing:.1em;}
.hub-grid .hub-card:nth-child(1){animation:rise .9s ease-out .50s both;}
.hub-grid .hub-card:nth-child(2){animation:rise .9s ease-out .58s both;}
.hub-grid .hub-card:nth-child(3){animation:rise .9s ease-out .66s both;}
.hub-grid .hub-card:nth-child(4){animation:rise .9s ease-out .74s both;}
.hub-grid .hub-card:nth-child(5){animation:rise .9s ease-out .82s both;}
.hub-grid .hub-card:nth-child(6){animation:rise .9s ease-out .90s both;}
.hub-grid .hub-card:nth-child(7){animation:rise .9s ease-out .98s both;}
/* ===== FOOTER ===== */
.footer{text-align:center;padding:46px 24px 36px;margin-top:30px;}
.footer-line{width:32px;height:1px;background:rgba(74,56,212,.2);margin:0 auto 18px;}
.footer-text{font-size:11px;letter-spacing:.18em;color:var(--ink-faint);text-transform:uppercase;}
.footer-vg{font-family:var(--font-display);font-style:italic;font-size:12.5px;color:var(--ink-faint);margin-top:8px;}
@keyframes rise{from{opacity:0;transform:translateY(16px);}to{opacity:1;transform:translateY(0);}}
@media(max-width:900px){.nav{padding:12px 20px;gap:12px;}.brand-zh,.nav-tabs{display:none;}.hub-grid,.stats-bar{grid-template-columns:1fr 1fr;}.hero{padding:46px 22px 20px;}.section,.hub-head{padding-left:22px;padding-right:22px;}}
@media(max-width:560px){.hub-grid,.stats-bar{grid-template-columns:1fr;}}