/* ===== 星聚时代品牌官网（全端适配版） ===== */
:root{
  /* 品牌主色 */
  --primary:#6c5ce7;
  --primary-dark:#5849d6;
  --deep:#4834d4;
  --blue:#3b82f6;
  --cyan:#06b6d4;
  --red:#e63946;
  --orange:#f59e0b;
  /* 文字 */
  --ink:#16172b;
  --body:#474a61;
  --muted:#888ba1;
  --line:#e9ebf4;
  /* 背景 */
  --bg:#f3f5fc;
  --bg-2:#ecf0fb;
  --page:#f7f8fe;
  /* 渐变 */
  --grad:linear-gradient(135deg,#6c5ce7 0%,#4a6fe3 55%,#3b82f6 100%);
  --grad-soft:linear-gradient(135deg,#f0eeff 0%,#e6f0ff 100%);
  --grad-mint:linear-gradient(135deg,#e7f7ff 0%,#eef0ff 100%);
  /* 阴影（分层、柔和、带品牌色） */
  --shadow-sm:0 4px 14px rgba(30,30,70,.05);
  --shadow:0 10px 30px rgba(72,52,212,.08);
  --shadow-hover:0 20px 48px rgba(72,52,212,.16);
  --shadow-glow:0 12px 30px rgba(108,92,231,.28);
  /* 玻璃质感 */
  --glass:rgba(255,255,255,.6);
  --glass-border:rgba(255,255,255,.72);
  --radius:18px;
  --radius-lg:24px;
  --header-h:72px;
  --safe-b:env(safe-area-inset-bottom,0px);
  --safe-r:env(safe-area-inset-right,0px);
  --safe-l:env(safe-area-inset-left,0px);
}
*{margin:0;padding:0;box-sizing:border-box}
html{
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 12px);
  -webkit-text-size-adjust:100%;
}
body{
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--body);
  background:linear-gradient(180deg,#fafaff 0%,#f4f7ff 42%,#f6f9ff 100%);
  line-height:1.7;font-size:16px;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
/* 固定装饰光斑：营造通透空间感，不影响交互 */
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(640px 440px at 10% 6%,rgba(108,92,231,.12),transparent 70%),
    radial-gradient(720px 500px at 90% 16%,rgba(59,130,246,.11),transparent 70%),
    radial-gradient(700px 540px at 52% 94%,rgba(6,182,212,.09),transparent 72%);
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}
.container{width:min(1200px,92%);margin:0 auto}
h1,h2,h3,h4{color:var(--ink);line-height:1.3;font-weight:800}
section{padding:clamp(56px,8vw,88px) 0}
.section-head{text-align:center;max-width:720px;margin:0 auto clamp(36px,5vw,54px)}
.section-head .eyebrow{display:inline-block;color:var(--primary);font-weight:700;font-size:14px;letter-spacing:2px;margin-bottom:12px}
.section-head h2{font-size:clamp(24px,4vw,34px);margin-bottom:16px}
.section-head p{color:var(--muted);font-size:16px}
.text-gradient{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;cursor:pointer;
  font-weight:700;border-radius:999px;padding:13px 30px;font-size:15px;transition:transform .25s,box-shadow .25s,background .25s;white-space:nowrap;
  min-height:44px;-webkit-tap-highlight-color:transparent}
.btn-sm{padding:9px 22px;font-size:14px;min-height:40px}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 24px rgba(108,92,231,.35)}
.btn-ghost{background:#fff;color:var(--primary);border:1.5px solid var(--primary)}
.btn-light{background:#fff;color:var(--primary)}
/* 触屏即时反馈 */
.btn:active{transform:scale(.97)}
/* 鼠标悬停上浮（仅在能悬停的设备） */
@media (hover:hover) and (pointer:fine){
  .btn-primary:hover{transform:translateY(-3px);box-shadow:0 16px 32px rgba(108,92,231,.45)}
  .btn-ghost:hover{background:var(--grad-soft);transform:translateY(-3px)}
  .btn-light:hover{transform:translateY(-3px);box-shadow:0 14px 28px rgba(0,0,0,.15)}
}

/* ===== 头部导航 ===== */
.header{position:fixed;top:0;left:0;right:0;z-index:100;
  transition:box-shadow .3s,background .3s,border-color .3s;
  background:rgba(255,255,255,.72);
  backdrop-filter:blur(18px) saturate(180%);-webkit-backdrop-filter:blur(18px) saturate(180%);
  border-bottom:1px solid rgba(255,255,255,.6)}
.header.scrolled{box-shadow:0 8px 28px rgba(20,20,50,.10);border-bottom-color:rgba(233,235,244,.85)}
.nav{display:flex;align-items:center;justify-content:space-between;height:var(--header-h)}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--ink)}
.logo-mark{width:38px;height:38px;flex:0 0 auto}
.logo small{display:block;font-size:10px;letter-spacing:1px;color:var(--muted);font-weight:600}
.nav-menu{display:flex;gap:clamp(16px,2.4vw,30px)}
.nav-menu a{font-size:15px;font-weight:600;color:var(--body);position:relative;padding:6px 0;transition:color .2s}
.nav-menu a:hover,.nav-menu a.active{color:var(--primary)}
.nav-menu a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--grad);transition:width .25s}
.nav-menu a:hover::after,.nav-menu a.active::after{width:100%}
.nav-cta{display:flex;align-items:center;gap:14px}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:10px;min-width:44px;min-height:44px;align-items:center;justify-content:center}
.burger span{width:26px;height:2.5px;background:var(--ink);border-radius:2px;transition:transform .3s,opacity .3s}
.burger.open span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}
/* 移动端菜单遮罩 */
.menu-overlay{position:fixed;inset:0;background:rgba(20,20,45,.4);z-index:98;opacity:0;visibility:hidden;transition:opacity .3s;backdrop-filter:blur(2px)}
.menu-overlay.show{opacity:1;visibility:visible}
body.menu-lock{overflow:hidden;height:100vh}

/* ===== Hero ===== */
.hero{padding:calc(var(--header-h) + clamp(40px,7vw,78px)) 0 clamp(50px,8vw,90px);overflow:hidden;
  background:
    radial-gradient(1000px 520px at 88% -12%,rgba(108,92,231,.20),transparent 60%),
    radial-gradient(820px 440px at -4% 18%,rgba(59,130,246,.18),transparent 56%),
    radial-gradient(680px 420px at 50% 112%,rgba(6,182,212,.12),transparent 60%),
    linear-gradient(180deg,#f6f4ff 0%,#eef3ff 68%,#f4f7ff 100%);
  position:relative}
/* 极淡网格纹理，顶部渐隐 */
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(108,92,231,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(108,92,231,.055) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:radial-gradient(ellipse 85% 72% at 50% 0%,#000 38%,transparent 78%);
  mask-image:radial-gradient(ellipse 85% 72% at 50% 0%,#000 38%,transparent 78%)}
.hero .container{position:relative;z-index:1}
.hero-grid{display:grid;grid-template-columns:1fr;gap:clamp(32px,5vw,50px);align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.72);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);color:var(--primary);
  border:1px solid rgba(255,255,255,.85);font-weight:700;font-size:13px;padding:7px 16px;
  border-radius:999px;margin-bottom:22px;box-shadow:var(--shadow-sm)}
.hero h1{font-size:clamp(30px,5vw,44px);margin-bottom:18px}
.hero .slogan{font-size:clamp(18px,2.6vw,22px);font-weight:700;color:var(--primary-dark);margin-bottom:16px}
.hero p.lead{font-size:17px;color:var(--body);margin-bottom:30px;max-width:560px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:38px}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.hero-stats .stat{background:rgba(255,255,255,.72);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border:1px solid rgba(255,255,255,.85);border-radius:14px;padding:16px 12px;text-align:center;box-shadow:var(--shadow-sm)}
.hero-stats .num{font-size:clamp(18px,2.4vw,24px);font-weight:800;color:var(--primary)}
.hero-stats .lbl{font-size:12.5px;color:var(--muted);margin-top:2px}
.hero-visual{position:relative}
.hero-visual img{border-radius:22px;box-shadow:var(--shadow);width:100%;aspect-ratio:1200/441;object-fit:cover}
.hero-visual .float-card{position:absolute;left:-18px;bottom:28px;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);
  border-radius:14px;padding:12px 18px;box-shadow:var(--shadow);display:flex;align-items:center;gap:10px}
.hero-visual .float-card .dot{width:38px;height:38px;border-radius:10px;background:var(--grad);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800}
.hero-visual .float-card b{display:block;color:var(--ink);font-size:15px}
.hero-visual .float-card span{font-size:12px;color:var(--muted)}

/* ===== 毛玻璃循环轮播 ===== */
.glass-carousel{position:relative;max-width:1080px;margin:0 auto;
  padding:clamp(12px,2vw,20px);border-radius:26px;
  background:rgba(255,255,255,.55);
  backdrop-filter:blur(18px) saturate(180%);-webkit-backdrop-filter:blur(18px) saturate(180%);
  border:1px solid rgba(255,255,255,.75);
  box-shadow:0 24px 60px rgba(72,52,212,.18)}
.carousel-viewport{overflow:hidden;border-radius:18px;
  background:linear-gradient(135deg,#eef0ff 0%,#e6f0ff 100%)}
.carousel-track{display:flex;transition:transform .6s cubic-bezier(.22,.61,.36,1);will-change:transform}
.carousel-slide{flex:0 0 100%;min-width:100%;position:relative;
  aspect-ratio:16/9;overflow:hidden}
.carousel-slide img{width:100%;height:100%;object-fit:cover;display:block}
.carousel-arrow{position:absolute;top:50%;transform:translateY(-50%);
  width:48px;height:48px;border-radius:50%;border:1px solid rgba(255,255,255,.75);
  background:rgba(255,255,255,.72);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  color:var(--primary);font-size:26px;line-height:1;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 22px rgba(40,40,80,.16);z-index:5;transition:background .25s,transform .25s}
.carousel-arrow.prev{left:clamp(14px,2.4vw,30px)}
.carousel-arrow.next{right:clamp(14px,2.4vw,30px)}
.carousel-dots{display:flex;justify-content:center;gap:10px;margin-top:clamp(12px,2vw,18px)}
.car-dot{width:10px;height:10px;border-radius:50%;border:none;cursor:pointer;padding:0;
  background:rgba(108,92,231,.28);transition:width .3s,background .3s}
.car-dot.active{width:28px;border-radius:999px;background:var(--grad)}
@media (hover:hover) and (pointer:fine){
  .carousel-arrow:hover{background:#fff;transform:translateY(-50%) scale(1.08)}
  .car-dot:hover{background:var(--primary)}
}
.carousel-arrow:active{transform:translateY(-50%) scale(.94)}
@media(max-width:520px){
  .glass-carousel{border-radius:20px}
  .carousel-arrow{width:40px;height:40px;font-size:22px}
  .carousel-viewport{border-radius:14px}
}
@media (prefers-reduced-motion:reduce){
  .carousel-track{transition:none}
}

/* ===== 信任条 ===== */
.trust{position:relative;overflow:hidden;background:var(--grad);padding:34px 0;
  box-shadow:inset 0 1px 2px rgba(255,255,255,.25)}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center;color:#fff}
.trust-grid .t b{font-size:clamp(20px,2.6vw,26px);font-weight:800;display:block}
.trust-grid .t span{font-size:14px;opacity:.92}

/* ===== 关于 ===== */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(34px,5vw,54px);align-items:center}
.about h2{font-size:clamp(26px,3.6vw,32px);margin-bottom:20px}
.about p{margin-bottom:16px}
.about-points{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:26px}
.about-points li{display:flex;gap:10px;align-items:flex-start;font-weight:600;color:var(--ink);font-size:15px}
.about-points .ic{width:26px;height:26px;flex:0 0 auto;border-radius:8px;background:var(--grad-soft);display:flex;align-items:center;justify-content:center;color:var(--primary);font-weight:800}
.about-visual{background:var(--grad-mint);border:1px solid rgba(255,255,255,.85);
  border-radius:24px;padding:40px;position:relative;box-shadow:var(--shadow-sm)}
.about-visual .big-num{font-size:clamp(90px,16vw,150px);font-weight:900;line-height:1;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;opacity:.9}
.about-visual .cap{font-size:18px;font-weight:700;color:var(--ink);margin-top:8px}

/* ===== 任务大厅 ===== */
.tasks{position:relative;background:
  radial-gradient(760px 460px at 98% -4%,rgba(108,92,231,.09),transparent 62%),
  radial-gradient(680px 460px at -2% 102%,rgba(59,130,246,.08),transparent 60%),
  linear-gradient(180deg,var(--bg-2),var(--bg))}
.task-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.task-card{background:#fff;border-radius:var(--radius);padding:24px 22px;box-shadow:var(--shadow-sm);
  transition:transform .28s,box-shadow .28s,border-color .28s;border:1px solid rgba(233,235,244,.9);
  display:flex;flex-direction:column;position:relative;overflow:hidden}
.task-card::after{content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:var(--grad);opacity:0;transition:opacity .28s}
.task-card .pay-tag{position:absolute;top:16px;right:16px;font-size:12px;font-weight:700;color:var(--primary);background:var(--grad-soft);padding:4px 10px;border-radius:999px}
.task-card .ticon{width:64px;height:64px;border-radius:16px;overflow:hidden;margin-bottom:16px;
  display:flex;align-items:center;justify-content:center;background:var(--grad-soft);
  border:1px solid rgba(255,255,255,.9);box-shadow:inset 0 1px 2px rgba(255,255,255,.85),0 6px 14px rgba(72,52,212,.10)}
.task-card .ticon img{width:42px;height:42px;object-fit:contain}
.task-card h3{font-size:17px;margin-bottom:8px}
.task-card .price{font-size:26px;font-weight:800;color:var(--primary);line-height:1.1}
.task-card .price small{font-size:13px;color:var(--muted);font-weight:600}
.task-card .meta{display:flex;align-items:center;gap:8px;margin:10px 0 6px;font-size:13px;color:var(--muted)}
.task-card .tcycle{background:#fff7e8;color:#d97706;font-weight:700;font-size:12px;padding:3px 9px;border-radius:999px}
.task-card .settle{font-size:12.5px;color:var(--muted);margin-bottom:16px}
.task-card .btn{margin-top:auto;width:100%}
@media (hover:hover) and (pointer:fine){
  .task-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-hover);border-color:rgba(108,92,231,.32)}
  .task-card:hover::after{opacity:1}
  .feature-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-hover);border-color:rgba(108,92,231,.3)}
  .why-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-hover)}
  .mentor-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
  .step-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
}
.task-card:active,.feature-card:active,.why-card:active,.step-card:active{transform:scale(.99)}

/* ===== 核心功能 ===== */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.feature-card{padding:32px 28px;border-radius:var(--radius);background:#fff;border:1px solid rgba(233,235,244,.9);
  transition:transform .28s,box-shadow .28s,border-color .28s;box-shadow:var(--shadow-sm);position:relative}
.feature-card .ficon{width:66px;height:66px;margin-bottom:18px;padding:11px;object-fit:contain;
  background:var(--grad-soft);border:1px solid rgba(255,255,255,.9);border-radius:16px;
  box-shadow:inset 0 1px 2px rgba(255,255,255,.85),0 6px 14px rgba(72,52,212,.10)}
.feature-card h3{font-size:19px;margin-bottom:10px}
.feature-card p{font-size:14.5px;color:var(--muted)}

/* ===== 优势 ===== */
.why{position:relative;background:
  radial-gradient(720px 460px at 4% -6%,rgba(59,130,246,.09),transparent 60%),
  radial-gradient(700px 480px at 100% 104%,rgba(108,92,231,.08),transparent 62%),
  linear-gradient(180deg,var(--bg),var(--bg-2))}
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.why-card{background:#fff;border-radius:var(--radius);padding:30px 24px;text-align:center;
  border:1px solid rgba(233,235,244,.9);box-shadow:var(--shadow-sm);
  transition:transform .28s,box-shadow .28s,border-color .28s}
.why-card .wicon{width:62px;height:62px;margin:0 auto 16px;border-radius:16px;background:var(--grad);
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:26px;font-weight:800;
  box-shadow:inset 0 1px 2px rgba(255,255,255,.35),0 10px 20px rgba(72,52,212,.28)}
.why-card h3{font-size:17px;margin-bottom:8px}
.why-card p{font-size:13.5px;color:var(--muted)}
.team-banner{margin-top:44px;background:var(--grad);border-radius:22px;padding:42px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:30px;color:#fff;flex-wrap:wrap;
  box-shadow:inset 0 1px 2px rgba(255,255,255,.28),0 18px 40px rgba(72,52,212,.32)}
.team-banner h3{color:#fff;font-size:clamp(20px,3vw,26px);margin-bottom:8px}
.team-banner p{opacity:.93;font-size:15px}
.team-banner .pct{font-size:44px;font-weight:900}

/* ===== 导师 ===== */
.mentor-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:20px}
.mentor-card{text-align:center;background:#fff;border:1px solid rgba(233,235,244,.9);border-radius:16px;
  padding:24px 12px;transition:transform .28s,box-shadow .28s,border-color .28s;box-shadow:var(--shadow-sm)}
.mentor-avatar{width:72px;height:72px;border-radius:50%;margin:0 auto 12px;background:var(--grad-soft);
  display:flex;align-items:center;justify-content:center;font-size:28px;font-weight:800;color:var(--primary);
  border:1px solid rgba(255,255,255,.9);box-shadow:inset 0 1px 2px rgba(255,255,255,.85),0 6px 14px rgba(72,52,212,.10)}
.mentor-card h4{font-size:15px}
.mentor-card span{font-size:12px;color:var(--muted)}
.mentor-extra{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:30px}
.mentor-box{background:var(--grad-mint);border:1px solid rgba(255,255,255,.85);
  border-radius:18px;padding:30px;display:flex;gap:18px;align-items:center;box-shadow:var(--shadow-sm)}
.mentor-box .mic{width:54px;height:54px;border-radius:14px;background:var(--grad);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:24px;flex:0 0 auto;
  box-shadow:inset 0 1px 2px rgba(255,255,255,.35),0 10px 20px rgba(72,52,212,.26)}
.mentor-box h3{font-size:18px;margin-bottom:4px}
.mentor-box p{font-size:14px;color:var(--muted)}

/* ===== 合规 ===== */
.compliance{position:relative;background:
  radial-gradient(720px 460px at 50% -6%,rgba(108,92,231,.08),transparent 62%),
  linear-gradient(180deg,var(--bg),var(--bg-2))}
.compliance .wrap{max-width:1000px;margin:0 auto}
.compliance img{border-radius:18px;box-shadow:var(--shadow);width:100%;aspect-ratio:1200/441;object-fit:cover}
.compliance .note{margin-top:24px;background:#fff;border-left:4px solid var(--primary);border-radius:12px;padding:22px 26px;font-size:15px}

/* ===== 注册流程 ===== */
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.step-card{background:#fff;border:1px solid rgba(233,235,244,.9);border-radius:var(--radius);padding:32px 26px;
  position:relative;transition:transform .28s,box-shadow .28s,border-color .28s;box-shadow:var(--shadow-sm)}
.step-card .num{width:48px;height:48px;border-radius:13px;background:var(--grad);color:#fff;font-weight:800;
  font-size:20px;display:flex;align-items:center;justify-content:center;margin-bottom:18px;
  box-shadow:inset 0 1px 2px rgba(255,255,255,.35),0 10px 20px rgba(72,52,212,.28)}
.step-card h3{font-size:18px;margin-bottom:8px}
.step-card p{font-size:14px;color:var(--muted)}
.invite-box{margin-top:44px;background:var(--grad-mint);border:1.5px dashed var(--primary);
  border-radius:20px;padding:36px;text-align:center;box-shadow:var(--shadow-sm)}
.invite-box .code{font-size:40px;font-weight:900;letter-spacing:8px;color:var(--primary);margin:10px 0 4px}
.invite-box p{color:var(--muted);font-size:14px;margin-bottom:20px}

/* ===== FAQ ===== */
.faq{position:relative;background:
  radial-gradient(740px 460px at 96% -4%,rgba(6,182,212,.08),transparent 60%),
  radial-gradient(680px 460px at 0% 104%,rgba(108,92,231,.08),transparent 60%),
  linear-gradient(180deg,var(--bg-2),var(--bg))}
.faq-list{max-width:840px;margin:0 auto}
.faq-item{background:#fff;border-radius:14px;margin-bottom:14px;border:1px solid rgba(233,235,244,.9);
  overflow:hidden;box-shadow:var(--shadow-sm)}
.faq-q{width:100%;text-align:left;background:none;border:none;cursor:pointer;padding:20px 26px;display:flex;justify-content:space-between;align-items:center;gap:16px;font-size:16px;font-weight:700;color:var(--ink);min-height:48px}
.faq-q .arrow{transition:transform .3s;color:var(--primary);font-size:20px;flex:0 0 auto}
.faq-item.open .faq-q .arrow{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 26px 22px;font-size:14.5px;color:var(--body)}

/* ===== 底部CTA ===== */
.cta-band{position:relative;overflow:hidden;background:var(--grad);padding:70px 0;text-align:center;color:#fff;
  box-shadow:inset 0 1px 2px rgba(255,255,255,.25)}
.cta-band::before{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(620px 320px at 18% -4%,rgba(255,255,255,.18),transparent 60%),
    radial-gradient(620px 320px at 86% 104%,rgba(255,255,255,.13),transparent 60%)}
.cta-band .container{position:relative;z-index:1}
.cta-band h2{color:#fff;font-size:clamp(26px,4vw,34px);margin-bottom:14px}
.cta-band p{opacity:.94;margin-bottom:30px;font-size:16px}
.cta-band .btn{margin:0 8px 10px}

/* ===== 页脚 ===== */
.footer{background:#14152a;color:#b9bbd0;padding:60px 0 calc(26px + var(--safe-b))}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;margin-bottom:40px}
.footer h4{color:#fff;font-size:16px;margin-bottom:18px}
.footer .logo{color:#fff;margin-bottom:14px}
.footer p{font-size:13.5px;line-height:1.8}
.footer li{margin-bottom:10px;font-size:14px}
.footer li a{padding:4px 0}
.footer li a:hover{color:#fff}
.footer .beian{border-top:1px solid rgba(255,255,255,.1);padding-top:22px;text-align:center;font-size:13px;color:#7e8099}

/* 回到顶部（含安全区） */
.back-top{position:fixed;right:calc(24px + var(--safe-r));bottom:calc(28px + var(--safe-b));width:46px;height:46px;border-radius:12px;background:var(--grad);color:#fff;border:none;cursor:pointer;
  display:flex;align-items:center;justify-content:center;font-size:20px;opacity:0;visibility:hidden;transition:opacity .3s,transform .3s;box-shadow:0 10px 24px rgba(108,92,231,.4);z-index:90}
.back-top.show{opacity:1;visibility:visible}
.back-top:active{transform:scale(.92)}

/* 入场动画 */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:none}

/* ===== 大屏增强（>1400） ===== */
@media(min-width:1400px){
  .container{width:min(1280px,90%)}
}

/* ===== 响应式断点 ===== */
@media(max-width:1100px){
  .nav-menu{gap:16px}
  .nav-menu a{font-size:14px}
}
@media(max-width:992px){
  .hero-grid,.about-grid{grid-template-columns:1fr;gap:40px}
  .hero-visual{order:-1}
  .task-grid{grid-template-columns:repeat(2,1fr)}
  .feature-grid,.steps-grid{grid-template-columns:repeat(2,1fr)}
  .why-grid{grid-template-columns:repeat(2,1fr)}
  .mentor-grid{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .trust-grid{grid-template-columns:repeat(2,1fr);gap:26px}
}
@media(max-width:860px){
  /* 平板提前切换汉堡，避免导航拥挤 */
  .nav-menu,.nav-cta .btn-ghost{display:none}
  .burger{display:flex}
  .nav-menu.mobile{display:flex;position:fixed;top:var(--header-h);left:var(--safe-l);right:var(--safe-r);
    flex-direction:column;background:#fff;padding:18px 6% calc(20px + var(--safe-b));gap:16px;
    box-shadow:0 16px 30px rgba(0,0,0,.1);z-index:99;max-height:calc(100dvh - var(--header-h));overflow-y:auto}
  .nav-menu.mobile a{font-size:16px;padding:10px 0;min-height:44px;display:flex;align-items:center}
}
@media(max-width:768px){
  .hero{padding:calc(var(--header-h) + 36px) 0 60px}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:14px}
  .about-points,.mentor-extra{grid-template-columns:1fr}
  .team-banner{flex-direction:column;text-align:center;padding:34px 26px}
  .hero-visual .float-card{left:12px;bottom:14px;padding:10px 14px}
  .hero-visual .float-card .dot{width:32px;height:32px;font-size:13px}
  .hero-visual .float-card b{font-size:14px}
  .hero-visual .float-card span{display:none}
}
@media(max-width:520px){
  .task-grid,.feature-grid,.steps-grid,.why-grid,.footer-grid{grid-template-columns:1fr}
  .mentor-grid{grid-template-columns:repeat(2,1fr)}
  .hero-actions{flex-direction:column}
  .hero-actions .btn{width:100%}
  .about-visual{padding:28px 20px}
  .invite-box{padding:28px 20px}
  .invite-box .code{letter-spacing:5px}
}
@media(max-width:360px){
  body{font-size:15px}
  .logo{font-size:18px}
  .nav-cta .btn-primary{padding:9px 16px}
  .hero-stats{gap:10px}
  .hero-stats .stat{padding:12px 8px}
}

/* ===== 最新资讯版块 ===== */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{display:flex;flex-direction:column;background:#fff;border:1px solid rgba(233,235,244,.9);
  border-radius:18px;padding:26px 24px;box-shadow:var(--shadow-sm);
  transition:transform .3s,box-shadow .3s,border-color .3s;position:relative;overflow:hidden}
.news-card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;
  background:var(--grad);opacity:0;transition:opacity .3s}
.news-card .news-date{font-size:13px;color:var(--muted);font-weight:600;margin-bottom:12px;
  display:inline-flex;align-items:center;gap:6px}
.news-card h3{font-size:18px;line-height:1.45;margin-bottom:12px;color:var(--ink)}
.news-card p{font-size:14.5px;color:var(--body);flex:1}
.news-card .more{margin-top:16px;color:var(--primary);font-weight:700;font-size:14px;
  display:inline-flex;align-items:center;gap:6px}
@media (hover:hover) and (pointer:fine){
  .news-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:rgba(108,92,231,.32)}
  .news-card:hover::before{opacity:1}
}
.news-card:active{transform:scale(.99)}
.news-more{margin-top:34px;text-align:center}

/* ===== 文章页 ===== */
body.article-page{padding-top:var(--header-h)}
.breadcrumb{font-size:13.5px;color:var(--muted);margin-bottom:20px;display:flex;flex-wrap:wrap;gap:6px}
.breadcrumb a{color:var(--primary);font-weight:600}
.article-wrap{max-width:820px;margin:0 auto}
.article-head{margin-bottom:34px;padding-bottom:26px;border-bottom:1px solid var(--line)}
.article-head h1{font-size:clamp(24px,4.4vw,36px);line-height:1.35;margin-bottom:16px}
.article-meta{font-size:13.5px;color:var(--muted);display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.article-meta .tag{background:var(--grad-soft);color:var(--primary);padding:3px 12px;border-radius:999px;font-weight:700}
.article-body{font-size:16.5px}
.article-body h2{font-size:clamp(20px,3vw,25px);margin:38px 0 16px;color:var(--ink);
  padding-left:14px;position:relative}
.article-body h2::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:5px;height:22px;border-radius:3px;background:var(--grad)}
.article-body h3{font-size:18.5px;margin:26px 0 12px;color:var(--primary-dark)}
.article-body p{margin-bottom:16px;color:var(--body);line-height:1.85}
.article-body ul{margin:0 0 18px;padding-left:4px}
.article-body ul li{position:relative;padding-left:22px;margin-bottom:10px;line-height:1.8}
.article-body ul li::before{content:"";position:absolute;left:2px;top:11px;width:8px;height:8px;
  border-radius:50%;background:var(--grad)}
.post-cta{margin:40px 0 8px;padding:30px 28px;border-radius:20px;text-align:center;
  background:linear-gradient(135deg,rgba(108,92,231,.1),rgba(59,130,246,.1));
  border:1px solid rgba(108,92,231,.2);box-shadow:var(--shadow-sm)}
.post-cta p{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:18px}
.article-nav{display:flex;justify-content:space-between;gap:16px;margin-top:44px;padding-top:26px;
  border-top:1px solid var(--line);flex-wrap:wrap}
.article-nav a{font-size:14.5px;color:var(--primary);font-weight:700;max-width:48%}
.article-nav .next{text-align:right;margin-left:auto}
@media(max-width:520px){
  .news-grid{grid-template-columns:1fr}
  .article-nav a{max-width:100%}
}
@media(min-width:521px) and (max-width:992px){
  .news-grid{grid-template-columns:repeat(2,1fr)}
}

/* ===== 资讯列表页 ===== */
.news-list{display:flex;flex-direction:column;gap:16px}
.news-list-item{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  background:#fff;border:1px solid rgba(233,235,244,.9);border-radius:16px;padding:22px 24px;
  box-shadow:var(--shadow-sm);
  transition:transform .3s,box-shadow .3s,border-color .3s}
.news-list-item .nli-main{min-width:0}
.news-list-item h3{font-size:17.5px;line-height:1.5;margin-bottom:8px;color:var(--ink);
  transition:color .3s}
.news-list-item p{font-size:14px;color:var(--body);line-height:1.7;margin:0}
.news-list-item time{flex-shrink:0;font-size:13px;color:var(--muted);font-weight:600;
  padding-top:3px;white-space:nowrap}
@media (hover:hover) and (pointer:fine){
  .news-list-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);
    border-color:rgba(108,92,231,.35)}
  .news-list-item:hover h3{color:var(--primary)}
}
.news-list-item:active{transform:scale(.99)}
@media(max-width:520px){
  .news-list-item{flex-direction:column;gap:10px;padding:18px}
  .news-list-item time{padding-top:0}
}

/* ===== 减少动态效果（系统设置） ===== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
}