/* ============================================================
   Telegram 中文指南 · 清新版 (Light Fresh Theme)
   青绿主色 / 全响应式 / 中俄双语
   ============================================================ */
:root {
    --teal-700: #0f766e;
    --teal-600: #0d9488;
    --teal-500: #14b8a6;
    --cyan-500: #06b6d4;
    --sky-500:  #0ea5e9;
    --grad: linear-gradient(135deg, #0d9488 0%, #06b6d4 60%, #0ea5e9 100%);
    --grad-soft: linear-gradient(135deg, #f0fdfa 0%, #ecfeff 100%);
    --ink:   #0f172a;
    --ink-2: #475569;
    --ink-3: #94a3b8;
    --line:  #e2e8f0;
    --gold:  #f59e0b;
    --green: #10b981;
    --bg:    #f8fafc;
    --shadow: 0 4px 20px rgba(13,148,136,.08);
    --shadow-lg: 0 16px 48px rgba(13,148,136,.14);
    --radius: 20px;
}
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
    background:var(--bg); color:var(--ink); line-height:1.75; overflow-x:hidden;
}
.container { max-width:1180px; margin:0 auto; padding:0 20px; }
[hidden]{display:none!important;}

/* ---------- Hero 内元素 ---------- */
.hero { position:relative; overflow:hidden; padding:64px 0 84px;
    background:linear-gradient(180deg,#ffffff 0%,#f0fdfa 100%); }
.hero::before,.hero::after{content:'';position:absolute;border-radius:50%;filter:blur(70px);opacity:.55;}
.hero::before{width:420px;height:420px;top:-140px;right:-80px;background:#99f6e4;}
.hero::after{width:340px;height:340px;bottom:-140px;left:-60px;background:#bae6fd;}
.hero-inner{position:relative;z-index:1;text-align:center;max-width:900px;margin:0 auto;}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1.5px solid #99f6e4;
    color:var(--teal-700);padding:6px 18px;border-radius:999px;font-size:13px;font-weight:800;
    margin-bottom:22px;box-shadow:var(--shadow);}
.hero h1{font-size:44px;font-weight:900;letter-spacing:1px;margin-bottom:16px;
    background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;}
.hero p{font-size:17px;color:var(--ink-2);max-width:660px;margin:0 auto 30px;}

/* 下载按钮（白胶囊 + 机器人图标） */
.btn-download{display:inline-flex;align-items:center;gap:10px;background:#fff;color:var(--teal-700);
    border:2px solid #5eead4;border-radius:999px;padding:16px 36px;font-size:17px;font-weight:900;
    text-decoration:none;cursor:pointer;box-shadow:0 10px 30px rgba(13,148,136,.18);
    transition:transform .25s,box-shadow .25s;white-space:nowrap;}
.btn-download:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(13,148,136,.28);}
.btn-download .dl-icon{font-size:22px;}
.btn-download small{font-size:12px;font-weight:700;color:var(--ink-3);display:block;line-height:1.2;text-align:left;}
.hero-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:22px;}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 28px;
    border-radius:999px;font-size:15px;font-weight:800;text-decoration:none;cursor:pointer;border:none;
    transition:transform .25s,box-shadow .25s;white-space:nowrap;}
.btn-grad{background:var(--grad);color:#fff;box-shadow:0 10px 26px rgba(13,148,136,.35);}
.btn-grad:hover{transform:translateY(-3px);box-shadow:0 14px 36px rgba(13,148,136,.45);}
.btn-white{background:#fff;color:var(--teal-700);border:2px solid #99f6e4;}
.btn-white:hover{border-color:var(--teal-500);transform:translateY(-3px);box-shadow:var(--shadow);}

/* QQ 支持条 */
.qqbar{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:10px 16px;
    background:#fff;border:1.5px solid #99f6e4;border-radius:18px;padding:14px 20px;margin-top:30px;
    box-shadow:var(--shadow);}
.qqbar-text{font-size:14.5px;font-weight:800;color:var(--ink);display:flex;align-items:center;}
.qqbar-text b{color:var(--teal-600);}
.qqbar-btns{display:flex;gap:8px;flex-wrap:wrap;}
.qq-chip{display:inline-flex;align-items:center;gap:6px;background:var(--grad);color:#fff;border:none;
    border-radius:999px;padding:8px 18px;font-size:14.5px;font-weight:900;letter-spacing:.5px;cursor:pointer;
    box-shadow:0 4px 12px rgba(13,148,136,.3);transition:transform .25s,box-shadow .25s;white-space:nowrap;}
.qq-chip:hover{transform:translateY(-2px) scale(1.03);box-shadow:0 8px 20px rgba(13,148,136,.4);}
.qq-chip.copied{background:linear-gradient(135deg,#10b981,#34d399);}
.qq-ico{width:20px;height:20px;object-fit:contain;display:block;border-radius:5px;}

/* ---------- 导航 ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);
    box-shadow:0 1px 0 var(--line);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px;}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;}
.logo-icon{width:38px;height:38px;border-radius:12px;background:var(--grad);display:flex;align-items:center;
    justify-content:center;font-size:20px;box-shadow:0 4px 12px rgba(13,148,136,.3);}
.logo-text{font-size:17px;font-weight:800;color:var(--teal-700);letter-spacing:.5px;white-space:nowrap;}
.logo-text small{display:block;font-size:10px;font-weight:600;color:var(--ink-3);letter-spacing:1px;}
.nav-links{display:flex;align-items:center;gap:4px;list-style:none;}
.nav-links a{display:block;padding:8px 13px;border-radius:10px;text-decoration:none;color:var(--ink-2);
    font-size:14.5px;font-weight:700;transition:all .2s;white-space:nowrap;}
.nav-links a:hover{background:#f0fdfa;color:var(--teal-700);}
.nav-links a.active{background:var(--grad);color:#fff;box-shadow:0 4px 12px rgba(13,148,136,.3);}
.nav-right{display:flex;align-items:center;gap:10px;}
.lang-toggle{border:2px solid #99f6e4;background:#fff;color:var(--teal-700);border-radius:999px;
    padding:6px 14px;font-size:13px;font-weight:800;cursor:pointer;transition:all .2s;white-space:nowrap;}
.menu-btn{display:none;width:40px;height:40px;border-radius:10px;border:none;background:#f0fdfa;
    color:var(--teal-700);font-size:20px;cursor:pointer;}

/* ---------- 区块 ---------- */
.section{padding:72px 0;}
.section-alt{background:#fff;}
.section-head{text-align:center;max-width:680px;margin:0 auto 46px;}
.section-tag{display:inline-block;padding:4px 16px;border-radius:999px;background:#f0fdfa;
    color:var(--teal-700);font-size:12.5px;font-weight:800;letter-spacing:1.5px;margin-bottom:14px;text-transform:uppercase;}
.section-head h2{font-size:32px;font-weight:900;margin-bottom:12px;line-height:1.3;}
.section-head p{color:var(--ink-2);font-size:15.5px;}

.grid{display:grid;gap:24px;}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-2{grid-template-columns:repeat(2,1fr);}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;
    box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s,border-color .3s;position:relative;overflow:hidden;}
.card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:var(--grad);
    transform:scaleX(0);transform-origin:left;transition:transform .35s;}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:#99f6e4;}
.card:hover::before{transform:scaleX(1);}
.card-icon{width:58px;height:58px;border-radius:16px;background:var(--grad-soft);border:1px solid #99f6e4;
    display:flex;align-items:center;justify-content:center;font-size:27px;margin-bottom:18px;}
.card h3{font-size:18.5px;font-weight:800;margin-bottom:10px;}
.card p{font-size:14.5px;color:var(--ink-2);}
.card-link{display:inline-flex;align-items:center;gap:6px;margin-top:16px;color:var(--teal-600);font-weight:800;font-size:14px;text-decoration:none;}
.card-link:hover{gap:10px;}

/* 步骤 */
.steps{counter-reset:step;display:flex;flex-direction:column;gap:18px;max-width:860px;margin:0 auto;}
.step{counter-increment:step;display:flex;gap:20px;align-items:flex-start;background:#fff;
    border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px;box-shadow:var(--shadow);
    transition:transform .25s,box-shadow .25s;}
.step:hover{transform:translateX(6px);box-shadow:var(--shadow-lg);}
.step::before{content:counter(step);flex-shrink:0;width:46px;height:46px;border-radius:14px;background:var(--grad);
    color:#fff;display:flex;align-items:center;justify-content:center;font-size:19px;font-weight:900;
    box-shadow:0 6px 16px rgba(13,148,136,.3);}
.step h3{font-size:17px;font-weight:800;margin-bottom:6px;}
.step p{font-size:14.5px;color:var(--ink-2);}
.step code{background:#f0fdfa;border:1px solid #99f6e4;padding:2px 8px;border-radius:6px;font-size:13px;color:var(--teal-700);}

/* 提醒卡（教程中插播的加群提示） */
.tip-box{max-width:860px;margin:26px auto 0;background:linear-gradient(135deg,#f0fdfa,#ecfeff);
    border:2px dashed #5eead4;border-radius:18px;padding:22px 26px;display:flex;align-items:center;
    justify-content:space-between;gap:16px;flex-wrap:wrap;}
.tip-box .tip-text{font-size:15px;font-weight:800;color:var(--ink);}
.tip-box .tip-text b{color:var(--teal-600);}
.tip-box .qqbar-btns{margin-left:auto;}

/* CTA */
.cta-band{background:var(--grad);border-radius:26px;color:#fff;text-align:center;padding:56px 26px;
    position:relative;overflow:hidden;box-shadow:var(--shadow-lg);}
.cta-band::before,.cta-band::after{content:'';position:absolute;border-radius:50%;background:rgba(255,255,255,.15);}
.cta-band::before{width:220px;height:220px;top:-90px;left:-50px;}
.cta-band::after{width:260px;height:260px;bottom:-120px;right:-60px;}
.cta-band h2{font-size:30px;font-weight:900;margin-bottom:12px;position:relative;z-index:1;line-height:1.3;}
.cta-band p{opacity:.95;margin-bottom:28px;position:relative;z-index:1;}
.cta-band .hero-cta{position:relative;z-index:1;margin-top:0;}
.cta-band .btn-white{background:#fff;color:var(--teal-700);border:none;padding:13px 26px;}

/* QQ 大卡 */
.qq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;max-width:880px;margin:0 auto;}
.qq-card{background:#fff;border:2px solid var(--line);border-radius:22px;padding:34px 28px;text-align:center;
    box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s,border-color .3s;position:relative;overflow:hidden;}
.qq-card::before{content:'';position:absolute;top:0;left:0;right:0;height:6px;background:var(--grad);}
.qq-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:#5eead4;}
.qq-num-big{font-size:34px;font-weight:900;color:var(--teal-700);letter-spacing:1px;margin:10px 0 4px;white-space:nowrap;}
.qq-card .role{font-size:13px;font-weight:700;color:var(--ink-3);margin-bottom:20px;}
.qq-copy-big{display:inline-flex;align-items:center;gap:8px;background:var(--grad);color:#fff;border:none;
    padding:12px 28px;border-radius:999px;font-size:15px;font-weight:800;cursor:pointer;
    box-shadow:0 8px 22px rgba(13,148,136,.35);transition:transform .25s,box-shadow .25s;white-space:nowrap;}
.qq-copy-big:hover{transform:translateY(-3px);}
.qq-copy-big.copied{background:linear-gradient(135deg,#10b981,#34d399);}

/* FAQ */
.faq-list{max-width:860px;margin:0 auto;display:flex;flex-direction:column;gap:14px;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:var(--shadow);}
.faq-q{width:100%;text-align:left;background:none;border:none;cursor:pointer;padding:18px 22px;
    font-size:15.5px;font-weight:800;color:var(--ink);display:flex;justify-content:space-between;align-items:center;gap:12px;}
.faq-q .arrow{transition:transform .3s;color:var(--teal-500);flex-shrink:0;}
.faq-item.open .arrow{transform:rotate(180deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;}
.faq-a-inner{padding:0 22px 20px;font-size:14.5px;color:var(--ink-2);}
.faq-item.open .faq-a{max-height:460px;}

/* 下载中心 */
.dl-hero-card{max-width:880px;margin:0 auto;background:#fff;border:2px solid #99f6e4;border-radius:26px;
    padding:44px 34px;text-align:center;box-shadow:var(--shadow-lg);position:relative;overflow:hidden;}
.dl-hero-card::before{content:'';position:absolute;top:0;left:0;right:0;height:6px;background:var(--grad);}
.dl-meta{display:flex;justify-content:center;gap:26px;flex-wrap:wrap;margin:22px 0;font-size:13.5px;color:var(--ink-3);font-weight:700;}
.dl-meta span{display:flex;align-items:center;gap:6px;}
.dl-note{font-size:12.5px;color:var(--ink-3);margin-top:18px;line-height:1.8;}
.platform-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;max-width:880px;margin:0 auto;}

/* 页脚（浅色） */
.footer{background:#fff;border-top:1px solid var(--line);color:var(--ink-2);padding:52px 0 30px;margin-top:40px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px;margin-bottom:36px;}
.footer h4{color:var(--ink);font-size:15px;font-weight:800;margin-bottom:14px;}
.footer p,.footer a{font-size:13.5px;color:var(--ink-3);text-decoration:none;}
.footer a:hover{color:var(--teal-600);}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:8px;}
.disclaimer{border-top:1px solid var(--line);padding-top:22px;font-size:11.5px;line-height:1.9;color:#94a3b8;}
.copy-right{text-align:center;font-size:12.5px;color:var(--ink-3);margin-top:20px;}

/* 内页 Hero */
.page-hero{background:linear-gradient(180deg,#ffffff,#f0fdfa);padding:44px 0 52px;position:relative;overflow:hidden;}
.page-hero::before{content:'';position:absolute;top:-80px;right:-40px;width:240px;height:240px;border-radius:50%;
    background:#99f6e4;filter:blur(60px);opacity:.6;}
.page-hero h1{font-size:32px;font-weight:900;position:relative;z-index:1;}
.page-hero p{opacity:.85;margin-top:8px;font-size:15.5px;position:relative;z-index:1;}
.breadcrumb{font-size:13px;color:var(--ink-3);margin-bottom:14px;position:relative;z-index:1;}
.breadcrumb a{color:var(--teal-600);text-decoration:none;}

.reveal{opacity:0;transform:translateY(26px);transition:opacity .6s ease,transform .6s ease;}
.reveal.visible{opacity:1;transform:none;}
.back-top{position:fixed;right:20px;bottom:24px;z-index:40;width:46px;height:46px;border-radius:14px;
    background:var(--grad);color:#fff;border:none;font-size:20px;cursor:pointer;
    box-shadow:0 8px 22px rgba(13,148,136,.4);opacity:0;pointer-events:none;transition:opacity .3s,transform .3s;}
.back-top.show{opacity:1;pointer-events:auto;}

@media (max-width:900px){
    .grid-3{grid-template-columns:repeat(2,1fr);}
    .footer-grid{grid-template-columns:1fr 1fr;}
    .hero h1{font-size:36px;}
}
@media (max-width:640px){
    .menu-btn{display:block;}
    .nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;
        align-items:stretch;padding:12px;gap:4px;box-shadow:0 16px 32px rgba(0,0,0,.1);border-top:1px solid var(--line);}
    .nav-links.open{display:flex;}
    .nav-links a{padding:12px 14px;}
    .grid-3,.grid-2,.qq-grid,.platform-grid{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1fr;}
    .hero{padding:44px 0 60px;}
    .hero h1{font-size:26px;}
    .hero p{font-size:14.5px;}
    .btn-download{font-size:15px;padding:14px 24px;}
    .hero-cta{flex-direction:column;align-items:stretch;width:100%;padding:0 6px;}
    .hero-cta .btn{width:100%;font-size:14.5px;padding:13px 12px;}
    .qqbar{flex-direction:column;padding:14px;gap:10px;}
    .qqbar-text{font-size:13px;text-align:center;}
    .qqbar-btns{width:100%;}
    .qqbar-btns .qq-chip{flex:1;justify-content:center;}
    .tip-box{flex-direction:column;text-align:center;}
    .tip-box .qqbar-btns{margin-left:0;width:100%;}
    .tip-box .qq-chip{flex:1;justify-content:center;}
    .section{padding:52px 0;}
    .section-head h2{font-size:21px;}
    .page-hero h1{font-size:23px;}
    .cta-band h2{font-size:20px;}
    .dl-hero-card{padding:34px 20px;}
    .logo-icon{width:32px;height:32px;font-size:16px;}
    .logo-text{font-size:14px;}
    .nav-inner{height:56px;}
    .nav-links{top:56px;}
    .logo-text small{display:none;}
}

/* ---------- v1.1 补丁 ---------- */
/* 下载按钮副标题居中 */
.btn-download > span { display:flex; flex-direction:column; align-items:center; line-height:1.35; }
.btn-download small { text-align:center; }

/* 登录流程截图 */
.step-img { margin:14px 0 2px; text-align:center; }
.step-img img { max-width:340px; width:100%; border-radius:14px; border:1px solid var(--line);
  box-shadow:var(--shadow); display:block; margin:0 auto; }
.step-img .cap { font-size:12.5px; color:var(--ink-3); margin-top:8px; font-weight:600; }
.step-img.noimg img { display:none; }
.step-img.noimg { padding:26px 10px; border:1.5px dashed #99f6e4; border-radius:14px;
  background:var(--grad-soft); }
.step-img.noimg .cap::before { content:'🖼 此处上传截图 '; }

/* 手机端首屏压缩 —— 确保 QQ 群一屏可见 */
@media (max-width:640px){
  .hero { padding:26px 0 40px; }
  .hero-badge { margin-bottom:14px; font-size:12px; padding:5px 14px; }
  .hero h1 { font-size:24px; margin-bottom:10px; }
  .hero p { font-size:13.5px; margin-bottom:18px; line-height:1.6; }
  .btn-download { font-size:14.5px; padding:12px 18px; }
  .btn-download small { font-size:11px; }
  .hero-cta { flex-direction:row; gap:8px; margin-top:14px; }
  .hero-cta .btn { flex:1; width:auto; font-size:13px; padding:11px 8px; }
  .qqbar { margin-top:14px; padding:12px; gap:8px; }
  .qqbar-text { font-size:12.5px; }
  .qq-chip { font-size:13.5px; padding:8px 12px; }
}