/* ============================================================
   星聚时代 APP 官网 · 星夜设计系统 app.css
   深色科技风 / 玻璃拟态 / 3D 交互 / 动效打磨
   ============================================================ */
:root{
  --bg:#070912;
  --bg-2:#0b0f1e;
  --surface:rgba(255,255,255,.045);
  --surface-2:rgba(255,255,255,.07);
  --line:rgba(255,255,255,.09);
  --line-strong:rgba(255,255,255,.16);
  --text:#eef1fb;
  --muted:#9aa3bd;
  --faint:#6b7390;
  --red:#e63946;
  --red-2:#ff5a6e;
  --cyan:#22d3ee;
  --violet:#8b5cf6;
  --blue:#5b8cff;
  --grad-brand:linear-gradient(120deg,#ff5a6e 0%,#e63946 55%,#ff8a5c 100%);
  --grad-cool:linear-gradient(120deg,#8b5cf6 0%,#5b8cff 50%,#22d3ee 100%);
  --grad-text:linear-gradient(115deg,#ff7a8c 0%,#ffb066 38%,#7dd3fc 78%,#a78bfa 100%);
  --shadow-card:0 24px 60px -28px rgba(0,0,0,.85),0 8px 24px -14px rgba(0,0,0,.6);
  --shadow-glow:0 0 0 1px var(--line),0 20px 50px -20px rgba(230,57,70,.35);
  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-spring:cubic-bezier(.34,1.56,.64,1);
  --radius:22px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.75;letter-spacing:-.005em;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(680px 480px at 12% -6%,rgba(230,57,70,.20),transparent 65%),
    radial-gradient(760px 520px at 88% 4%,rgba(91,140,255,.18),transparent 65%),
    radial-gradient(700px 600px at 50% 108%,rgba(139,92,246,.16),transparent 65%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size:46px 46px;
  mask-image:radial-gradient(ellipse at 50% 0%,#000 30%,transparent 78%);
}
h1,h2,h3,h4{margin:0;color:var(--text);letter-spacing:-.022em;line-height:1.25;font-weight:800}
p{margin:0 0 14px}
a{color:inherit;text-decoration:none;transition:color .25s}
img{max-width:100%;display:block}
ul{margin:0 0 14px;padding-left:20px}
li{margin:7px 0}
button{font-family:inherit;cursor:pointer}
.container{width:min(1200px,92%);margin:0 auto}
.num,.price,.stat .v{font-variant-numeric:tabular-nums}
.grad-text{background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ===== 滚动进度 ===== */
.scroll-progress{position:fixed;top:0;left:0;height:3px;width:0;z-index:200;
  background:linear-gradient(90deg,var(--red-2),var(--violet),var(--cyan));box-shadow:0 0 14px rgba(230,57,70,.6)}

/* ===== 顶部导航 ===== */
.header{position:fixed;top:0;left:0;right:0;z-index:100;transition:background .35s,box-shadow .35s,border-color .35s;border-bottom:1px solid transparent}
.header.scrolled{background:rgba(7,9,18,.78);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom-color:var(--line)}
.nav{display:flex;align-items:center;gap:26px;height:74px}
.logo{display:flex;align-items:center;gap:11px;font-weight:800;font-size:18px;white-space:nowrap;letter-spacing:-.01em}
.logo-mark{width:38px;height:38px;flex:0 0 auto;filter:drop-shadow(0 6px 14px rgba(230,57,70,.45))}
.logo small{display:block;font-size:10.5px;color:var(--faint);letter-spacing:.22em;font-weight:600;margin-top:1px}
.nav-menu{display:flex;gap:4px;margin-left:auto;position:relative}
.nav-menu a{position:relative;z-index:2;padding:9px 15px;font-size:14.5px;color:var(--muted);border-radius:999px;white-space:nowrap;transition:color .3s}
.nav-menu a:hover,.nav-menu a.active{color:var(--text)}
.nav-pill{position:absolute;top:0;left:0;height:38px;border-radius:999px;z-index:1;
  background:var(--surface-2);border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);transition:transform .45s var(--ease-spring),width .45s var(--ease-spring),opacity .3s}
.nav-cta{display:flex;align-items:center;gap:12px}
.burger{display:none;background:none;border:0;width:42px;height:42px;flex-direction:column;justify-content:center;gap:6px}
.burger span{display:block;height:2px;background:var(--text);border-radius:2px;transition:transform .35s,opacity .3s}

/* ===== 按钮 ===== */
.btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 30px;border-radius:999px;font-size:15px;font-weight:700;letter-spacing:-.01em;
  border:1px solid transparent;overflow:hidden;white-space:nowrap;
  transition:transform .35s var(--ease-spring),box-shadow .35s,background .3s,border-color .3s}
.btn-primary{background:var(--grad-brand);color:#fff;
  box-shadow:0 16px 34px -14px rgba(230,57,70,.7),inset 0 1px 0 rgba(255,255,255,.28)}
.btn-primary:hover{box-shadow:0 22px 44px -14px rgba(230,57,70,.85),inset 0 1px 0 rgba(255,255,255,.32)}
.btn-ghost{background:var(--surface);color:var(--text);border-color:var(--line-strong)}
.btn-ghost:hover{background:var(--surface-2);border-color:rgba(255,255,255,.26)}
.btn-sm{padding:10px 22px;font-size:14px}
.btn::after{content:"";position:absolute;top:0;left:-120%;width:60%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.35),transparent);transform:skewX(-18deg)}
.btn:hover::after{animation:btnSheen .9s ease}
@keyframes btnSheen{to{left:140%}}

/* ===== Hero ===== */
.hero{position:relative;padding:150px 0 90px;display:flex;flex-direction:column;align-items:center;text-align:center}
.hero-badge{display:inline-flex;align-items:center;gap:9px;padding:8px 18px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);font-size:13.5px;color:var(--muted);margin-bottom:26px}
.hero-badge i{width:7px;height:7px;border-radius:50%;background:var(--red-2);box-shadow:0 0 10px var(--red-2);animation:pulse 2s infinite}
@keyframes pulse{50%{opacity:.45}}
.hero h1{font-size:clamp(34px,5.4vw,62px);max-width:980px;margin-bottom:20px}
.hero .lead{max-width:720px;color:var(--muted);font-size:clamp(15.5px,1.5vw,18px);margin:0 auto 36px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;justify-content:center;margin-bottom:64px}
.hero-stage{position:relative;width:100%;display:flex;justify-content:center;perspective:1200px}
.hero-orbs{position:absolute;inset:0;pointer-events:none}
.hero-orbs span{position:absolute;border-radius:50%;filter:blur(2px);opacity:.7}
.hero-orbs .o1{width:14px;height:14px;background:var(--red-2);top:12%;left:18%;animation:float 6s ease-in-out infinite}
.hero-orbs .o2{width:10px;height:10px;background:var(--cyan);top:26%;right:20%;animation:float 7s 1s infinite}
.hero-orbs .o3{width:8px;height:8px;background:var(--violet);bottom:18%;left:24%;animation:float 8s .5s infinite}
.hero-orbs .o4{width:12px;height:12px;background:var(--blue);bottom:10%;right:26%;animation:float 6.5s 1.4s infinite}
@keyframes float{50%{transform:translateY(-18px)}}

/* 手机模型（纯 CSS 构建 APP 界面） */
.phone{position:relative;width:clamp(250px,26vw,300px);aspect-ratio:9/19;border-radius:44px;padding:11px;
  background:linear-gradient(160deg,#1a2036,#0c1020 60%,#141a30);
  border:1px solid var(--line-strong);
  box-shadow:0 50px 100px -30px rgba(0,0,0,.9),0 0 0 1px rgba(255,255,255,.05),0 0 80px -20px rgba(230,57,70,.4);
  transform-style:preserve-3d;will-change:transform}
.phone::before{content:"";position:absolute;top:18px;left:50%;transform:translateX(-50%);width:92px;height:24px;
  background:#05070f;border-radius:0 0 16px 16px;z-index:5}
.screen{width:100%;height:100%;border-radius:34px;overflow:hidden;background:linear-gradient(180deg,#101427,#0a0d1c);
  display:flex;flex-direction:column;position:relative}
.scr-status{display:flex;justify-content:space-between;padding:14px 22px 6px;font-size:11px;color:var(--muted);font-weight:600}
.scr-head{display:flex;align-items:center;gap:9px;padding:8px 18px 12px}
.scr-head .m{width:26px;height:26px;border-radius:8px;background:var(--grad-brand);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;color:#fff}
.scr-head b{font-size:14px;letter-spacing:-.01em}
.scr-balance{margin:4px 16px 12px;padding:14px 16px;border-radius:18px;
  background:linear-gradient(135deg,rgba(230,57,70,.9),rgba(255,120,90,.85));color:#fff}
.scr-balance small{display:block;font-size:10.5px;opacity:.85;letter-spacing:.08em}
.scr-balance .v{font-size:24px;font-weight:800;letter-spacing:-.02em}
.scr-list{flex:1;padding:0 16px;display:flex;flex-direction:column;gap:9px;overflow:hidden}
.scr-row{display:flex;align-items:center;gap:10px;padding:9px 11px;border-radius:14px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.06)}
.scr-row .ic{width:30px;height:30px;border-radius:9px;flex:0 0 auto;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:800;color:#fff}
.scr-row .t{flex:1;min-width:0}
.scr-row .t b{display:block;font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.scr-row .t span{font-size:10px;color:var(--faint)}
.scr-row .go{font-size:11px;color:var(--red-2);font-weight:700}
.scr-tab{display:flex;justify-content:space-around;padding:10px 0 16px;border-top:1px solid var(--line)}
.scr-tab i{width:34px;height:34px;border-radius:11px;display:flex;align-items:center;justify-content:center;font-size:13px;font-style:normal;color:var(--faint)}
.scr-tab i.on{background:var(--surface-2);color:var(--red-2)}

/* 数据条 */
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;width:min(920px,100%);margin-top:70px}
.hero-stats .stat{padding:22px 16px;border-radius:18px;background:var(--surface);border:1px solid var(--line)}
.hero-stats .v{font-size:clamp(22px,2.4vw,30px);font-weight:800;letter-spacing:-.03em;
  background:var(--grad-cool);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stats .lbl{font-size:12.5px;color:var(--muted);margin-top:5px}

/* ===== 信任跑马灯 ===== */
.trust{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:20px 0;overflow:hidden;
  background:linear-gradient(90deg,rgba(230,57,70,.06),rgba(139,92,246,.06),rgba(34,211,238,.05))}
.marquee{display:flex;gap:56px;width:max-content;animation:marquee 26s linear infinite}
.marquee span{color:var(--muted);font-size:14px;white-space:nowrap;display:flex;align-items:center;gap:10px}
.marquee span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--red-2);opacity:.8}
@keyframes marquee{to{transform:translateX(-50%)}}

/* ===== 通用区块 ===== */
.section{padding:clamp(70px,9vw,110px) 0;position:relative}
.section-head{text-align:center;max-width:720px;margin:0 auto 56px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 17px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);font-size:12px;font-weight:700;letter-spacing:.22em;
  color:var(--red-2);margin-bottom:20px}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--red-2);box-shadow:0 0 8px var(--red-2)}
.section-head h2{font-size:clamp(26px,3.4vw,40px);margin-bottom:14px}
.section-head p{color:var(--muted);font-size:15.5px;margin:0}
.section-head::after{content:"";display:block;width:64px;height:3px;border-radius:3px;margin:22px auto 0;
  background:linear-gradient(90deg,var(--red-2),var(--violet));opacity:.85}

/* ===== 玻璃卡片基础 ===== */
.glass{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-card);overflow:hidden;will-change:transform;
  transition:transform .5s var(--ease),border-color .4s,box-shadow .4s}
.glass::before{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;opacity:0;
  background:radial-gradient(420px circle at var(--mx,50%) var(--my,50%),rgba(255,255,255,.12),transparent 60%);
  transition:opacity .4s}
.glass::after{content:"";position:absolute;top:0;left:10%;right:10%;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.35),transparent)}
@media (hover:hover) and (pointer:fine){
  .glass:hover{border-color:var(--line-strong);box-shadow:var(--shadow-card),0 0 50px -18px rgba(230,57,70,.5)}
  .glass:hover::before{opacity:1}
}

/* ===== 关于 / 邀请码 ===== */
.about-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:40px;align-items:center}
.invite-card{padding:44px 36px;text-align:center}
.invite-card .cap{font-size:13px;color:var(--muted);letter-spacing:.12em}
.invite-card .code{font-size:clamp(44px,7vw,66px);font-weight:800;letter-spacing:.12em;line-height:1.15;margin:8px 0 6px;
  background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 12px 30px rgba(230,57,70,.35))}
.invite-card .sub{font-size:13.5px;color:var(--muted);margin-bottom:22px}
.about-copy h2{font-size:clamp(24px,3vw,34px);margin-bottom:18px}
.about-copy p{color:var(--muted)}
.check-list{list-style:none;padding:0;margin:18px 0 0}
.check-list li{position:relative;padding-left:30px;color:var(--text);font-size:15px}
.check-list li::before{content:"✓";position:absolute;left:0;top:0;width:20px;height:20px;border-radius:50%;
  background:rgba(230,57,70,.16);color:var(--red-2);font-size:12px;display:flex;align-items:center;justify-content:center;font-weight:800}

/* ===== 任务大厅 ===== */
.task-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.task-card{padding:24px 22px;display:flex;flex-direction:column}
.task-card .t-icon{width:58px;height:58px;border-radius:16px;padding:10px;margin-bottom:16px;
  background:linear-gradient(160deg,rgba(255,255,255,.1),rgba(255,255,255,.03));border:1px solid var(--line)}
.task-card h3{font-size:16.5px;margin-bottom:6px}
.task-card .price{font-size:28px;font-weight:800;letter-spacing:-.03em;margin-bottom:4px;
  background:var(--grad-cool);-webkit-background-clip:text;background-clip:text;color:transparent}
.task-card .pill{display:inline-flex;align-self:flex-start;padding:3px 11px;border-radius:999px;font-size:11.5px;
  background:rgba(230,57,70,.12);border:1px solid rgba(230,57,70,.25);color:var(--red-2);margin-bottom:10px}
.task-card .meta{font-size:12.5px;color:var(--faint);margin-bottom:18px}
.task-card .btn{margin-top:auto;width:100%;padding:12px}

/* ===== 核心功能 ===== */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feature-card{padding:30px 26px}
.feature-card .f-icon{width:66px;height:66px;border-radius:18px;padding:12px;margin-bottom:18px;
  background:linear-gradient(160deg,rgba(139,92,246,.22),rgba(34,211,238,.12));border:1px solid var(--line)}
.feature-card h3{font-size:18px;margin-bottom:8px}
.feature-card p{font-size:14px;color:var(--muted);margin:0}

/* ===== 为什么选择 ===== */
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.why-card{padding:32px 22px;text-align:center}
.why-card .w-ic{width:60px;height:60px;border-radius:18px;margin:0 auto 16px;display:flex;align-items:center;justify-content:center;
  font-size:24px;font-weight:800;color:#fff;background:var(--grad-brand);box-shadow:0 14px 30px -12px rgba(230,57,70,.7)}
.why-card h3{font-size:17px;margin-bottom:7px}
.why-card p{font-size:13px;color:var(--muted);margin:0}

/* ===== 团队激励横幅 ===== */
.team-banner{position:relative;border-radius:28px;padding:52px 50px;display:flex;align-items:center;justify-content:space-between;gap:30px;overflow:hidden;
  background:linear-gradient(120deg,#1a1030,#2a1226 55%,#33141c);border:1px solid var(--line)}
.team-banner::before{content:"";position:absolute;top:-60%;right:-10%;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(230,57,70,.35),transparent 70%)}
.team-banner h3{font-size:clamp(22px,2.6vw,32px);position:relative}
.team-banner h3 .pct{font-size:clamp(34px,4.4vw,52px);margin:0 8px;
  background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.team-banner p{color:var(--muted);font-size:14.5px;margin:8px 0 0;position:relative}

/* ===== 导师 ===== */
.mentor-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:18px}
.mentor-card{padding:26px 14px;text-align:center}
.mentor-avatar{width:64px;height:64px;border-radius:50%;margin:0 auto 14px;display:flex;align-items:center;justify-content:center;
  font-size:24px;font-weight:800;color:#fff;background:var(--grad-cool);
  box-shadow:0 0 0 4px rgba(139,92,246,.12),0 14px 28px -12px rgba(91,140,255,.6)}
.mentor-card h4{font-size:15px;margin-bottom:3px}
.mentor-card span{font-size:12px;color:var(--muted)}

/* ===== 注册流程 ===== */
.step-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.step-card{padding:28px 26px}
.step-card .s-num{width:40px;height:40px;border-radius:13px;margin-bottom:16px;display:flex;align-items:center;justify-content:center;
  font-size:17px;font-weight:800;color:#fff;background:var(--grad-brand);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.4),0 12px 24px -10px rgba(230,57,70,.65)}
.step-card h3{font-size:17px;margin-bottom:7px}
.step-card p{font-size:13.5px;color:var(--muted);margin:0}

/* ===== FAQ ===== */
.faq-list{max-width:840px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{border-radius:18px;overflow:hidden;background:var(--surface);border:1px solid var(--line);transition:border-color .35s}
.faq-item.open{border-color:rgba(230,57,70,.4)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:21px 26px;background:none;border:0;color:var(--text);font-size:15.5px;font-weight:700;text-align:left;letter-spacing:-.01em}
.faq-q .arrow{width:26px;height:26px;border-radius:50%;flex:0 0 auto;display:flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.07);border:1px solid var(--line);font-size:14px;transition:transform .4s var(--ease-spring),background .3s}
.faq-item.open .arrow{background:var(--grad-brand);border-color:transparent;transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .5s var(--ease)}
.faq-a p{padding:0 26px 22px;color:var(--muted);font-size:14.5px;margin:0}

/* ===== 资讯 ===== */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{padding:26px 24px;display:flex;flex-direction:column}
.news-date{font-size:12.5px;color:var(--red-2);display:inline-flex;align-items:center;gap:7px;margin-bottom:14px}
.news-date::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--red-2)}
.news-card h3{font-size:17px;margin-bottom:9px;line-height:1.45}
.news-card p{font-size:13.5px;color:var(--muted);flex:1}
.news-card .more{font-size:13.5px;color:var(--cyan);font-weight:700;margin-top:12px}
.news-more{text-align:center;margin-top:42px}

/* ===== 底部 CTA ===== */
.cta-band{padding:clamp(70px,9vw,100px) 0;text-align:center;position:relative;overflow:hidden;
  border-top:1px solid var(--line);
  background:radial-gradient(600px 300px at 50% 120%,rgba(230,57,70,.25),transparent 70%)}
.cta-band h2{font-size:clamp(28px,4vw,46px);margin-bottom:16px}
.cta-band p{color:var(--muted);margin-bottom:32px}

/* ===== 页脚 ===== */
.footer{border-top:1px solid var(--line);padding:64px 0 30px;background:rgba(255,255,255,.02)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:34px;margin-bottom:40px}
.footer p{color:var(--muted);font-size:13.5px;max-width:340px;margin-top:14px}
.footer h4{font-size:15px;margin-bottom:14px}
.footer ul{list-style:none;padding:0;margin:0}
.footer li{font-size:13.5px;color:var(--muted);margin:9px 0}
.footer li a:hover{color:var(--text)}
.beian{border-top:1px solid var(--line);padding-top:24px;text-align:center;color:var(--faint);font-size:12.5px}

/* ===== 回到顶部 ===== */
.back-top{position:fixed;right:26px;bottom:26px;width:46px;height:46px;border-radius:50%;z-index:90;
  background:var(--surface-2);border:1px solid var(--line-strong);color:var(--text);font-size:18px;
  opacity:0;pointer-events:none;transform:translateY(14px);transition:opacity .35s,transform .35s var(--ease)}
.back-top.show{opacity:1;pointer-events:auto;transform:translateY(0)}

/* ===== 入场动画 ===== */
.reveal{opacity:0;transform:translateY(34px) scale(.985);filter:blur(4px);
  transition:opacity .9s var(--ease),transform .9s var(--ease),filter .9s var(--ease)}
.reveal.in{opacity:1;transform:none;filter:blur(0)}
.reveal-title{overflow:hidden}
.reveal-title span{display:inline-block;transform:translateY(110%);transition:transform 1s var(--ease)}
.reveal-title.in span{transform:none}

/* ===== 文章页 ===== */
.article-page{padding-top:74px}
.article-wrap{max-width:860px;padding:120px 0 70px}
.breadcrumb{font-size:13.5px;color:var(--faint);margin-bottom:28px}
.breadcrumb a{color:var(--red-2)}
.breadcrumb span{margin:0 8px}
.article-head{margin-bottom:34px;padding-bottom:26px;border-bottom:1px solid var(--line)}
.article-head h1{font-size:clamp(26px,3.6vw,38px);margin-bottom:18px}
.article-meta{display:flex;gap:16px;flex-wrap:wrap;align-items:center;font-size:13px;color:var(--muted)}
.article-meta .tag{padding:4px 13px;border-radius:999px;background:var(--surface);border:1px var(--line) solid;color:var(--red-2);font-size:12.5px}
.article-body h2{font-size:clamp(21px,2.6vw,27px);margin:38px 0 16px;padding-left:14px;position:relative}
.article-body h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:4px;background:var(--grad-brand)}
.article-body h3{font-size:18px;margin:26px 0 10px;color:var(--red-2)}
.article-body p{color:#c6cde0}
.article-body li{color:#c6cde0}
.post-cta{margin-top:40px;padding:36px 30px;text-align:center;border-radius:22px;
  background:linear-gradient(135deg,rgba(230,57,70,.12),rgba(139,92,246,.1));border:1px solid var(--line)}
.post-cta p{color:var(--muted);margin-bottom:18px}
.post-related{margin-top:34px;font-size:13.5px;color:var(--muted);line-height:2.2}
.post-related a{color:var(--cyan)}
.article-nav{display:flex;justify-content:space-between;gap:18px;margin-top:44px;font-size:13.5px}
.article-nav a{color:var(--muted);max-width:48%}
.article-nav a:hover{color:var(--text)}

/* ===== 列表页 ===== */
.list-page{padding-top:74px}
.list-wrap{padding:120px 0 80px}
.list-head{margin-bottom:36px}
.list-head h1{font-size:clamp(28px,3.8vw,40px);margin-bottom:8px}
.list-head p{color:var(--muted)}
.news-list{display:flex;flex-direction:column;gap:16px}
.news-list-item{display:flex;gap:24px;align-items:center;padding:26px 28px;border-radius:20px;
  background:var(--surface);border:1px solid var(--line);transition:transform .4s var(--ease),border-color .35s,background .3s}
.news-list-item:hover{transform:translateX(6px);border-color:var(--line-strong);background:var(--surface-2)}
.news-list-item h3{font-size:17px;margin-bottom:7px}
.news-list-item p{font-size:13.5px;color:var(--muted);margin:0}
.news-list-item time{flex:0 0 auto;color:var(--red-2);font-size:13px;font-weight:700;font-variant-numeric:tabular-nums}

/* ===== 响应式 ===== */
@media(max-width:1024px){
  .task-grid,.why-grid{grid-template-columns:repeat(2,1fr)}
  .feature-grid,.step-grid,.news-grid{grid-template-columns:repeat(2,1fr)}
  .mentor-grid{grid-template-columns:repeat(3,1fr)}
  .about-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
  .nav-menu{position:fixed;top:74px;left:0;right:0;flex-direction:column;gap:6px;padding:18px 5%;
    background:rgba(7,9,18,.96);backdrop-filter:blur(18px);border-bottom:1px solid var(--line);
    transform:translateY(-130%);transition:transform .4s var(--ease);margin:0}
  .nav-menu.open{transform:none}
  .nav-pill{display:none}
  .burger{display:flex}
  .nav-cta .btn-sm{display:none}
  .hero{padding-top:118px}
  .hero-stats{grid-template-columns:repeat(2,1fr);margin-top:48px}
  .team-banner{flex-direction:column;align-items:flex-start;padding:38px 28px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .news-list-item{flex-direction:column;align-items:flex-start;gap:8px}
}
@media(max-width:520px){
  .task-grid,.feature-grid,.step-grid,.news-grid,.why-grid,.mentor-grid{grid-template-columns:1fr}
  .hero-actions{flex-direction:column;width:100%}
  .hero-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .article-nav{flex-direction:column}
  .article-nav a{max-width:100%}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none;filter:none}
}

/* ===== 文章返回按钮（深色） ===== */
.back-btn{display:inline-flex;align-items:center;gap:6px;margin-bottom:16px;padding:9px 16px;
  background:var(--surface);border:1px solid var(--line);border-radius:999px;color:var(--text);
  font-size:13.5px;font-weight:600;backdrop-filter:blur(10px);transition:all .25s ease}
.back-btn:hover{border-color:rgba(255,90,110,.5);color:#ff8a9a;transform:translateX(-2px)}

/* ===== 分类筛选（深色） ===== */
.cat-chips{display:flex;flex-wrap:wrap;gap:10px;margin:8px 0 12px}
.cat-chip{display:inline-flex;align-items:center;gap:7px;padding:9px 16px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);font-size:13.5px;font-weight:600;color:var(--muted);
  cursor:pointer;backdrop-filter:blur(10px);transition:all .25s ease}
.cat-chip span{font-size:12px;font-weight:700;color:#ff8a9a;background:rgba(230,57,70,.18);
  border-radius:999px;padding:1px 8px;line-height:1.5}
.cat-chip:hover{border-color:var(--line-strong);color:var(--text)}
.cat-chip.active{background:var(--grad-brand);border-color:transparent;color:#fff}
.cat-chip.active span{background:rgba(255,255,255,.22);color:#fff}
.cat-result{font-size:13px;color:var(--muted);margin:0 0 16px}