/* ============================================================
   瓜瓜社 · 全站设计系统 style.css
   分区：1 变量 2 重置 3 布局 4 文字 5 按钮 6 导航 7 卡片 8 Hero
        9 跑马灯 10 视频卡 11 榜单 12 话题/文章 13 数据/特性
        14 评价 15 CTA/下载 16 FAQ 17 提示条/弹层 18 页脚
        19 内页页头 20 分页 21 滚动动画 22 响应式 23 附加组件
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root{
  /* 品牌色三档 */
  --brand:#0eb87f;            /* 瓜皮绿 */
  --brand-deep:#089163;
  --brand-dark:#046b48;
  --brand-soft:#e4f8ef;
  /* 点缀色 */
  --melon:#ff4d6d;            /* 瓜瓤红 */
  --melon-soft:#ffe9ee;
  --sun:#ffb020;              /* 瓜籽黄 */
  --sun-soft:#fff4dd;
  --grape:#7c5cff;            /* 藤蔓紫 */
  --grape-soft:#efeaff;
  /* 中性色 */
  --ink:#12261f;
  --ink-2:#3c5349;
  --ink-3:#6b8177;
  --line:#e3ece7;
  --line-2:#cfe0d7;
  --bg:#f6fbf8;
  --bg-2:#eef6f1;
  --card:#ffffff;
  /* 渐变 */
  --grad-brand:linear-gradient(135deg,#0eb87f 0%,#0aa8d6 100%);
  --grad-melon:linear-gradient(135deg,#ff4d6d 0%,#ff8a5c 100%);
  --grad-night:linear-gradient(140deg,#07231a 0%,#0b3a2a 55%,#123f31 100%);
  /* 圆角 */
  --r-xs:8px; --r-sm:12px; --r-md:18px; --r-lg:26px; --r-xl:34px; --r-full:999px;
  /* 阴影 */
  --sh-1:0 2px 8px rgba(18,38,31,.06);
  --sh-2:0 8px 24px rgba(18,38,31,.09);
  --sh-3:0 16px 44px rgba(18,38,31,.13);
  --sh-brand:0 10px 26px rgba(14,184,127,.28);
  --sh-melon:0 10px 26px rgba(255,77,109,.26);
  /* 布局 */
  --container:1160px;
  --gutter:22px;
  --ease:cubic-bezier(.22,.8,.3,1);
  /* 字号（流式） */
  --fs-hero:clamp(2.1rem,1.4rem + 3.2vw,3.6rem);
  --fs-h1:clamp(1.8rem,1.3rem + 2vw,2.7rem);
  --fs-h2:clamp(1.45rem,1.15rem + 1.2vw,2.05rem);
  --fs-h3:clamp(1.1rem,1rem + .5vw,1.35rem);
}

/* ---------- 2. 基础重置 ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"Outfit","Noto Sans SC",-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--ink-2);line-height:1.7;font-size:16px;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{font:inherit;cursor:pointer;border:0;background:none}
input,select,textarea{font:inherit;color:inherit}
strong,b{color:var(--ink);font-weight:700}
::selection{background:rgba(14,184,127,.25)}
:focus-visible{outline:3px solid rgba(14,184,127,.55);outline-offset:2px;border-radius:6px}
h1,h2,h3,h4,h5{color:var(--ink);line-height:1.28;font-weight:800;letter-spacing:.01em}
h1{font-size:var(--fs-h1)}
h2{font-size:var(--fs-h2)}
h3{font-size:var(--fs-h3)}
p{margin-bottom:.9em}
p:last-child{margin-bottom:0}
.muted{color:var(--ink-3);font-size:.92em}

/* ---------- 3. 布局工具 ---------- */
.container{max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}
.section{padding:clamp(56px,5vw + 30px,96px) 0}
.section--tight{padding:clamp(40px,3vw + 20px,64px) 0}
.section--alt{background:var(--bg-2)}
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-side{grid-template-columns:1.2fr .8fr;align-items:start}
.flex{display:flex;gap:14px;flex-wrap:wrap}
.center{text-align:center}
.sec-head{max-width:680px;margin:0 auto 42px;text-align:center}
.sec-head--left{margin-left:0;text-align:left}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.8rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand-dark);background:var(--brand-soft);
  padding:6px 14px;border-radius:var(--r-full);margin-bottom:14px;
}
.eyebrow--melon{color:#c81e42;background:var(--melon-soft)}
.eyebrow--sun{color:#9a6400;background:var(--sun-soft)}
.eyebrow--grape{color:#5a3ed1;background:var(--grape-soft)}

/* ---------- 4. 文字标题组件 ---------- */
.hl{
  position:relative;z-index:0;display:inline-block;white-space:nowrap;
}
.hl::after{
  content:"";position:absolute;left:-2px;right:-2px;bottom:.08em;height:.42em;
  background:linear-gradient(90deg,rgba(14,184,127,.32),rgba(255,176,32,.38));
  border-radius:6px;z-index:-1;transform:skew(-8deg);
}
.hl--melon::after{background:linear-gradient(90deg,rgba(255,77,109,.30),rgba(255,138,92,.34))}
.sub{color:var(--ink-3);font-size:1.02rem;max-width:640px}
.sec-head .sub{margin:10px auto 0}
.sec-head--left .sub{margin-left:0}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 26px;border-radius:var(--r-full);
  font-weight:700;font-size:.98rem;line-height:1.2;white-space:nowrap;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease),color .25s var(--ease);
  will-change:transform;
}
.btn svg{width:18px;height:18px;flex:none}
.btn:hover{transform:translateY(-3px)}
.btn:active{transform:translateY(-1px) scale(.98)}
.btn--primary{background:var(--grad-brand);color:#fff;box-shadow:var(--sh-brand)}
.btn--primary:hover{box-shadow:0 14px 32px rgba(14,184,127,.38)}
.btn--melon{background:var(--grad-melon);color:#fff;box-shadow:var(--sh-melon)}
.btn--melon:hover{box-shadow:0 14px 32px rgba(255,77,109,.36)}
.btn--ghost{background:#fff;color:var(--ink);box-shadow:inset 0 0 0 2px var(--line-2)}
.btn--ghost:hover{box-shadow:inset 0 0 0 2px var(--brand);color:var(--brand-dark)}
.btn--light{background:rgba(255,255,255,.14);color:#fff;box-shadow:inset 0 0 0 2px rgba(255,255,255,.35);backdrop-filter:blur(6px)}
.btn--light:hover{background:rgba(255,255,255,.24)}
.btn--sm{padding:9px 18px;font-size:.88rem}
.btn--lg{padding:16px 34px;font-size:1.05rem}
.btn-group{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.link-more{
  display:inline-flex;align-items:center;gap:6px;font-weight:700;color:var(--brand-dark);
}
.link-more::after{content:"→";transition:transform .25s var(--ease)}
.link-more:hover::after{transform:translateX(5px)}

/* ---------- 6. 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,251,248,.86);backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;transition:border-color .3s,box-shadow .3s;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 6px 20px rgba(18,38,31,.07)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:18px;height:72px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:1.25rem;color:var(--ink)}
.logo-mark{
  width:40px;height:40px;border-radius:14px;flex:none;
  background:var(--grad-melon);display:grid;place-items:center;
  box-shadow:var(--sh-melon);position:relative;overflow:hidden;
}
.logo-mark::before{content:"";position:absolute;inset:6px 6px 14px;border-radius:50% 50% 46% 46%;background:rgba(255,255,255,.22)}
.logo-mark span{position:relative;font-size:1.15rem;line-height:1}
.logo em{font-style:normal;color:var(--melon)}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  padding:9px 15px;border-radius:var(--r-full);font-weight:600;font-size:.95rem;color:var(--ink-2);
  transition:background .25s,color .25s;
}
.nav-links a:hover{background:var(--brand-soft);color:var(--brand-dark)}
.nav-links a.is-active{background:var(--ink);color:#fff}
.nav-cta{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;width:46px;height:46px;border-radius:14px;background:#fff;
  box-shadow:inset 0 0 0 2px var(--line-2);position:relative;z-index:70;
}
.nav-toggle span{
  position:absolute;left:13px;right:13px;height:2.5px;border-radius:3px;background:var(--ink);
  transition:transform .3s var(--ease),opacity .2s;
}
.nav-toggle span:nth-child(1){top:16px}
.nav-toggle span:nth-child(2){top:22px}
.nav-toggle span:nth-child(3){top:28px}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-scrim{
  position:fixed;inset:0;z-index:55;background:rgba(7,35,26,.45);
  opacity:0;pointer-events:none;transition:opacity .3s;
}
.nav-scrim.is-show{opacity:1;pointer-events:auto}

/* ---------- 7. 卡片 ---------- */
.card{
  background:var(--card);border-radius:var(--r-lg);box-shadow:var(--sh-1);
  padding:26px;border:1px solid var(--line);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.card:hover{transform:translateY(-6px);box-shadow:var(--sh-2)}
.card h3{margin-bottom:8px}
.card p{font-size:.94rem;color:var(--ink-3)}
.card .ico{
  width:52px;height:52px;border-radius:16px;display:grid;place-items:center;
  font-size:1.5rem;margin-bottom:16px;background:var(--brand-soft);
}
.card .ico--melon{background:var(--melon-soft)}
.card .ico--sun{background:var(--sun-soft)}
.card .ico--grape{background:var(--grape-soft)}
.tag{
  display:inline-flex;align-items:center;gap:5px;padding:4px 12px;border-radius:var(--r-full);
  font-size:.76rem;font-weight:700;background:var(--bg-2);color:var(--ink-2);
}
.tag--melon{background:var(--melon-soft);color:#c81e42}
.tag--brand{background:var(--brand-soft);color:var(--brand-dark)}
.tag--sun{background:var(--sun-soft);color:#9a6400}
.tag--grape{background:var(--grape-soft);color:#5a3ed1}

/* ---------- 8. Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:var(--grad-night);color:#dbe9e2;
  padding:clamp(64px,6vw + 30px,110px) 0 clamp(72px,6vw + 40px,120px);
}
.hero::before{
  content:"";position:absolute;width:560px;height:560px;border-radius:50%;
  background:radial-gradient(circle,rgba(14,184,127,.32),transparent 65%);
  top:-180px;right:-140px;pointer-events:none;
}
.hero::after{
  content:"";position:absolute;width:460px;height:460px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,77,109,.22),transparent 65%);
  bottom:-200px;left:-120px;pointer-events:none;
}
.hero .container{position:relative;z-index:2}
.hero h1{color:#fff;font-size:var(--fs-hero);margin-bottom:18px}
.hero p{color:#b9d2c6;font-size:1.08rem;max-width:560px}
.hero .eyebrow{background:rgba(255,255,255,.1);color:#8fe6c2}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.hero-badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:26px}
.hero-badges .tag{background:rgba(255,255,255,.1);color:#cfe6db;border:1px solid rgba(255,255,255,.14)}
.hero-stats{display:flex;gap:36px;margin-top:36px;flex-wrap:wrap}
.hero-stats b{display:block;font-size:1.7rem;color:#fff}
.hero-stats span{font-size:.85rem;color:#9dbcae}
.hero-visual{position:relative}
.hero-visual .photo{
  border-radius:var(--r-xl);box-shadow:var(--sh-3);overflow:hidden;
  transform:rotate(2.5deg);border:6px solid rgba(255,255,255,.92);
}
.hero-visual .photo img{width:100%;aspect-ratio:4/4.6;object-fit:cover}
.float-chip{
  position:absolute;background:#fff;color:var(--ink);border-radius:16px;
  box-shadow:var(--sh-2);padding:10px 16px;font-size:.82rem;font-weight:700;
  display:flex;align-items:center;gap:8px;white-space:nowrap;
}
.float-chip small{display:block;font-weight:500;color:var(--ink-3);font-size:.72rem}
.float-chip .dot{width:9px;height:9px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px rgba(14,184,127,.2)}
.float-chip--1{top:-18px;left:-14px;animation:floaty 4.5s ease-in-out infinite}
.float-chip--2{bottom:36px;right:-20px;animation:floaty 5.2s .6s ease-in-out infinite}
.float-chip--3{bottom:-16px;left:26px;animation:floaty 4.8s 1.1s ease-in-out infinite}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}

/* ---------- 9. 跑马灯 ---------- */
.ticker{
  background:var(--ink);color:#cfe6db;overflow:hidden;
  padding:13px 0;font-size:.9rem;
}
.ticker-track{display:flex;gap:48px;width:max-content;animation:ticker 36s linear infinite}
.ticker:hover .ticker-track{animation-play-state:paused}
.ticker-track span{display:inline-flex;align-items:center;gap:9px;white-space:nowrap}
.ticker-track b{color:#8fe6c2}
.ticker-track .up{color:var(--sun)}
@keyframes ticker{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ---------- 10. 视频卡 ---------- */
.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.video-card{
  background:var(--card);border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--sh-1);transition:transform .3s var(--ease),box-shadow .3s var(--ease);
  display:flex;flex-direction:column;
}
.video-card:hover{transform:translateY(-6px);box-shadow:var(--sh-2)}
.thumb{position:relative;overflow:hidden;aspect-ratio:16/9.6;background:var(--bg-2)}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.video-card:hover .thumb img{transform:scale(1.06)}
.thumb .badge{
  position:absolute;top:12px;left:12px;z-index:2;
  padding:4px 11px;border-radius:var(--r-full);font-size:.72rem;font-weight:800;color:#fff;
}
.badge--melon{background:var(--grad-melon)}
.badge--brand{background:var(--grad-brand)}
.badge--grape{background:var(--grape)}
.badge--sun{background:#e89400}
.thumb .dur{
  position:absolute;right:12px;bottom:12px;z-index:2;
  background:rgba(7,20,15,.78);color:#fff;font-size:.72rem;font-weight:700;
  padding:3px 9px;border-radius:8px;
}
.thumb .play{
  position:absolute;inset:0;z-index:3;display:grid;place-items:center;
  opacity:0;transition:opacity .3s;background:rgba(7,35,26,.18);
}
.video-card:hover .thumb .play,.video-card:focus-within .thumb .play{opacity:1}
.play-btn{
  width:58px;height:58px;border-radius:50%;background:rgba(255,255,255,.94);
  display:grid;place-items:center;box-shadow:var(--sh-2);transition:transform .3s var(--ease);
}
.video-card:hover .play-btn{transform:scale(1.08)}
.play-btn::after{
  content:"";display:block;margin-left:4px;
  border-left:16px solid var(--melon);border-top:10px solid transparent;border-bottom:10px solid transparent;
}
.video-card .body{padding:18px 20px 20px}
.video-card .body h3{font-size:1.02rem;margin-bottom:7px}
.video-card .meta{display:flex;align-items:center;gap:12px;font-size:.8rem;color:var(--ink-3);margin-top:10px}
.filter-bar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:30px}
.filter-bar button{
  padding:9px 20px;border-radius:var(--r-full);font-weight:700;font-size:.88rem;
  background:#fff;color:var(--ink-2);box-shadow:inset 0 0 0 2px var(--line-2);
  transition:all .25s var(--ease);
}
.filter-bar button:hover{color:var(--brand-dark);box-shadow:inset 0 0 0 2px var(--brand)}
.filter-bar button.is-on{background:var(--ink);color:#fff;box-shadow:none}

/* ---------- 11. 榜单 ---------- */
.rank-list{display:flex;flex-direction:column;gap:14px}
.rank-item{
  display:flex;align-items:center;gap:18px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  padding:14px 18px;transition:transform .25s var(--ease),box-shadow .25s var(--ease);
}
.rank-item:hover{transform:translateX(6px);box-shadow:var(--sh-2)}
.rank-no{
  width:44px;height:44px;flex:none;border-radius:14px;display:grid;place-items:center;
  font-weight:800;font-size:1.05rem;background:var(--bg-2);color:var(--ink-3);
}
.rank-no--1{background:var(--grad-melon);color:#fff;box-shadow:var(--sh-melon)}
.rank-no--2{background:var(--grad-brand);color:#fff;box-shadow:var(--sh-brand)}
.rank-no--3{background:var(--grape);color:#fff}
.rank-item .thumb-s{
  width:86px;height:60px;flex:none;border-radius:12px;overflow:hidden;
}
.rank-item .thumb-s img{width:100%;height:100%;object-fit:cover}
.rank-item h3{font-size:.98rem;margin-bottom:3px}
.rank-item .meta{font-size:.78rem;color:var(--ink-3);display:flex;gap:12px;flex-wrap:wrap}
.rank-heat{
  margin-left:auto;text-align:right;flex:none;
  font-weight:800;color:var(--melon);font-size:.95rem;display:flex;flex-direction:column;align-items:flex-end;gap:2px;
}
.rank-heat small{font-weight:600;color:var(--ink-3);font-size:.7rem}
.heat-bar{width:74px;height:6px;border-radius:4px;background:var(--bg-2);overflow:hidden}
.heat-bar i{display:block;height:100%;border-radius:4px;background:var(--grad-melon)}
.rank-top3 .rank-item{padding:16px 18px}

/* ---------- 12. 话题/文章列表 ---------- */
.topic-card{
  display:grid;grid-template-columns:180px 1fr;gap:20px;align-items:center;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:18px;transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.topic-card:hover{transform:translateY(-5px);box-shadow:var(--sh-2)}
.topic-card .tp{border-radius:var(--r-md);overflow:hidden;aspect-ratio:16/10.5}
.topic-card .tp img{width:100%;height:100%;object-fit:cover}
.topic-card h3{font-size:1.08rem;margin:7px 0 6px}
.topic-card p{font-size:.9rem;color:var(--ink-3)}
.article-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);display:flex;flex-direction:column;
}
.article-card:hover{transform:translateY(-6px);box-shadow:var(--sh-2)}
.article-card .cover{aspect-ratio:16/8.5;overflow:hidden}
.article-card .cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.article-card:hover .cover img{transform:scale(1.05)}
.article-card .body{padding:22px 24px 24px}
.article-card h3{font-size:1.08rem;margin:8px 0 8px}
.article-card p{font-size:.92rem;color:var(--ink-3)}
.article-card .meta{font-size:.78rem;color:var(--ink-3);display:flex;gap:12px;margin-top:12px;flex-wrap:wrap}
.cloud{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.cloud a{
  padding:8px 18px;border-radius:var(--r-full);background:#fff;border:1px solid var(--line);
  font-size:.86rem;font-weight:600;color:var(--ink-2);transition:all .25s var(--ease);
}
.cloud a:hover{background:var(--brand);border-color:var(--brand);color:#fff;transform:translateY(-2px)}

/* ---------- 13. 数据/特性 ---------- */
.stat-band{
  background:var(--grad-brand);border-radius:var(--r-xl);color:#fff;
  padding:clamp(34px,4vw,54px) clamp(24px,4vw,56px);
  display:grid;grid-template-columns:repeat(4,1fr);gap:26px;
  box-shadow:var(--sh-brand);position:relative;overflow:hidden;
}
.stat-band::before{
  content:"";position:absolute;width:300px;height:300px;border-radius:50%;
  background:rgba(255,255,255,.12);top:-150px;left:-90px;
}
.stat-band b{display:block;font-size:clamp(1.7rem,1.2rem + 1.6vw,2.5rem);color:#fff;line-height:1.15}
.stat-band span{font-size:.88rem;color:rgba(255,255,255,.85)}
.stat-band>div{position:relative}
.feature-row{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step-list{counter-reset:step;display:flex;flex-direction:column;gap:22px}
.step{
  display:flex;gap:20px;align-items:flex-start;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:24px 26px;
}
.step::before{
  counter-increment:step;content:counter(step);
  width:46px;height:46px;flex:none;border-radius:15px;display:grid;place-items:center;
  background:var(--grad-melon);color:#fff;font-weight:800;font-size:1.15rem;box-shadow:var(--sh-melon);
}
.step h3{font-size:1.05rem;margin-bottom:5px}
.step p{font-size:.92rem;color:var(--ink-3);margin:0}

/* ---------- 14. 评价 ---------- */
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.quote{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px;position:relative;
}
.quote::before{
  content:"“";position:absolute;top:6px;right:22px;font-size:4.6rem;line-height:1;
  color:var(--brand-soft);font-family:Georgia,serif;
}
.quote p{font-size:.95rem;color:var(--ink-2);position:relative}
.quote .who{display:flex;align-items:center;gap:12px;margin-top:18px}
.avatar{
  width:46px;height:46px;border-radius:50%;flex:none;display:grid;place-items:center;
  font-weight:800;color:#fff;font-size:1.05rem;
}
.avatar--g{background:var(--grad-brand)}
.avatar--m{background:var(--grad-melon)}
.avatar--p{background:var(--grape)}
.avatar--s{background:#e89400}
.quote .who b{display:block;font-size:.94rem;color:var(--ink)}
.quote .who span{font-size:.78rem;color:var(--ink-3)}
.stars{color:var(--sun);letter-spacing:2px;font-size:.9rem;margin-bottom:12px}

/* ---------- 15. CTA / 下载 ---------- */
.cta-band{
  background:var(--grad-night);border-radius:var(--r-xl);
  padding:clamp(40px,5vw,72px) clamp(26px,5vw,72px);
  text-align:center;position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(14,184,127,.35),transparent 65%);
  top:-160px;right:-110px;
}
.cta-band::after{
  content:"";position:absolute;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,77,109,.25),transparent 65%);
  bottom:-160px;left:-90px;
}
.cta-band h2,.cta-band h3{color:#fff;position:relative;z-index:2}
.cta-band p{color:#b9d2c6;position:relative;z-index:2;max-width:560px;margin:12px auto 0}
.cta-band .btn-group{justify-content:center;margin-top:28px;position:relative;z-index:2}
.store-btn{
  display:inline-flex;align-items:center;gap:13px;
  background:#fff;color:var(--ink);border-radius:var(--r-md);padding:12px 22px;
  box-shadow:var(--sh-2);transition:transform .25s var(--ease),box-shadow .25s var(--ease);
  text-align:left;
}
.store-btn:hover{transform:translateY(-3px);box-shadow:var(--sh-3)}
.store-btn svg{width:28px;height:28px;flex:none}
.store-btn small{display:block;font-size:.68rem;color:var(--ink-3);font-weight:600;letter-spacing:.06em}
.store-btn b{font-size:1.02rem;color:var(--ink)}
.qr-box{
  display:inline-flex;flex-direction:column;align-items:center;gap:10px;
  background:#fff;border-radius:var(--r-lg);padding:16px;box-shadow:var(--sh-2);
}
.qr-code{
  width:148px;height:148px;border-radius:var(--r-sm);
  background:
    conic-gradient(var(--ink) 25%,transparent 0 50%,var(--ink) 0 75%,transparent 0) 0 0/28px 28px,
    #fff;
  border:10px solid #fff;outline:2px solid var(--line-2);
  position:relative;overflow:hidden;
}
.qr-code::after{
  content:"瓜";position:absolute;inset:0;display:grid;place-items:center;
  font-size:2rem;font-weight:800;color:var(--melon);background:rgba(255,255,255,.82);
}
.qr-box small{font-size:.76rem;color:var(--ink-3);font-weight:600}

/* ---------- 16. FAQ ---------- */
.faq{max-width:780px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden}
.faq-q{
  width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding:20px 24px;text-align:left;font-weight:700;color:var(--ink);font-size:1rem;
}
.faq-q::after{
  content:"+";font-size:1.5rem;color:var(--brand);font-weight:600;flex:none;
  transition:transform .3s var(--ease);
}
.faq-item.is-open .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s var(--ease)}
.faq-a-inner{padding:0 24px 22px;font-size:.94rem;color:var(--ink-3)}

/* ---------- 17. 提示条 / 弹层 ---------- */
.notice{
  display:flex;gap:12px;align-items:flex-start;
  background:var(--sun-soft);border:1px solid #f5dfae;border-radius:var(--r-md);
  padding:16px 20px;font-size:.88rem;color:#7a5410;
}
.notice b{color:#7a5410}
.toast{
  position:fixed;left:50%;bottom:34px;transform:translate(-50%,20px);
  background:var(--ink);color:#fff;padding:12px 24px;border-radius:var(--r-full);
  font-size:.9rem;font-weight:600;box-shadow:var(--sh-3);z-index:90;
  opacity:0;pointer-events:none;transition:opacity .3s,transform .3s var(--ease);
}
.toast.is-show{opacity:1;transform:translate(-50%,0)}
.modal{
  position:fixed;inset:0;z-index:80;display:grid;place-items:center;padding:20px;
  background:rgba(7,35,26,.6);backdrop-filter:blur(4px);
  opacity:0;pointer-events:none;transition:opacity .3s;
}
.modal.is-open{opacity:1;pointer-events:auto}
.modal-box{
  position:relative;background:#0b1f18;border-radius:var(--r-xl);max-width:860px;width:100%;
  aspect-ratio:16/9;box-shadow:var(--sh-3);overflow:hidden;
  transform:scale(.94);transition:transform .3s var(--ease);
}
.modal.is-open .modal-box{transform:scale(1)}
.modal-box .fake-screen{
  position:absolute;inset:0;display:grid;place-items:center;text-align:center;
  background:radial-gradient(circle at 50% 36%,rgba(14,184,127,.28),transparent 62%),var(--grad-night);
  color:#cfe6db;padding:24px;
}
.modal-box .fake-screen b{color:#fff;font-size:1.2rem;display:block;margin-bottom:8px}
.modal-close{
  position:absolute;top:14px;right:14px;z-index:5;width:42px;height:42px;border-radius:50%;
  background:rgba(255,255,255,.92);color:var(--ink);font-size:1.2rem;font-weight:700;
  display:grid;place-items:center;transition:transform .25s var(--ease);
}
.modal-close:hover{transform:rotate(90deg)}

/* ---------- 18. 页脚 ---------- */
.site-footer{
  background:var(--grad-night);color:#9dbcae;margin-top:clamp(56px,5vw,90px);
  padding:64px 0 0;font-size:.92rem;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px}
.site-footer h4{color:#fff;font-size:.95rem;margin-bottom:16px;letter-spacing:.05em}
.site-footer a{color:#9dbcae;transition:color .25s}
.site-footer a:hover{color:#8fe6c2}
.site-footer li{margin-bottom:10px}
.site-footer .logo{color:#fff}
.footer-about p{font-size:.88rem;max-width:300px;margin-top:14px}
.footer-tags{display:flex;gap:8px;flex-wrap:wrap}
.footer-tags a{
  font-size:.78rem;padding:5px 12px;border-radius:var(--r-full);
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.1);
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:22px 0;
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:.8rem;
}
.disclaimer{font-size:.76rem;color:#7d948a;line-height:1.7;border-top:1px solid rgba(255,255,255,.08);padding:18px 0}

/* ---------- 19. 内页页头 ---------- */
.page-hero{
  background:var(--grad-night);color:#dbe9e2;
  padding:clamp(52px,4.5vw + 24px,84px) 0;position:relative;overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,176,32,.16),transparent 65%);
  top:-140px;right:6%;
}
.page-hero h1{color:#fff;font-size:var(--fs-h1);margin-bottom:12px}
.page-hero p{color:#b9d2c6;max-width:620px}
.breadcrumb{display:flex;gap:8px;align-items:center;font-size:.82rem;color:#8fae9f;margin-bottom:16px;flex-wrap:wrap}
.breadcrumb a{color:#8fe6c2}
.breadcrumb .sep{opacity:.5}

/* ---------- 20. 分页 ---------- */
.pager{display:flex;justify-content:center;gap:8px;margin-top:44px;flex-wrap:wrap}
.pager a,.pager span{
  min-width:42px;height:42px;padding:0 14px;display:inline-grid;place-items:center;
  border-radius:13px;font-weight:700;font-size:.9rem;
  background:#fff;border:1px solid var(--line);color:var(--ink-2);
  transition:all .25s var(--ease);
}
.pager a:hover{border-color:var(--brand);color:var(--brand-dark)}
.pager .is-current{background:var(--ink);color:#fff;border-color:var(--ink)}

/* ---------- 21. 滚动动画 ---------- */
[data-reveal]{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
[data-reveal].is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
  [data-reveal]{opacity:1;transform:none}
}

/* ---------- 22. 响应式 ---------- */
@media (max-width:1080px){
  .hero-grid{grid-template-columns:1fr;gap:52px}
  .hero-visual{max-width:520px;margin:0 auto}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .video-grid{grid-template-columns:repeat(2,1fr)}
  .feature-row,.quote-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .stat-band{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:960px){
  .nav-toggle{display:block}
  .nav-links{
    position:fixed;top:0;right:0;bottom:0;z-index:65;
    width:min(320px,84vw);background:#fff;
    flex-direction:column;align-items:stretch;gap:4px;padding:96px 22px 30px;
    transform:translateX(105%);transition:transform .35s var(--ease);
    box-shadow:-16px 0 40px rgba(18,38,31,.18);
  }
  .nav-links.is-open{transform:none}
  .nav-links a{padding:14px 18px;font-size:1.02rem;border-radius:var(--r-md)}
  .nav-links a.is-active{background:var(--brand-soft);color:var(--brand-dark)}
  .nav-cta .btn{display:none}
  .grid-side{grid-template-columns:1fr}
}
@media (max-width:680px){
  .grid-2,.grid-3,.grid-4,.video-grid,.feature-row,.quote-grid{grid-template-columns:1fr}
  .topic-card{grid-template-columns:1fr}
  .topic-card .tp{aspect-ratio:16/8}
  .btn-group .btn{flex:1 1 100%}
  .hero-stats{gap:22px}
  .hero-stats>div{min-width:calc(50% - 22px)}
  .float-chip--1{left:0}
  .float-chip--2{right:0}
  .rank-item .thumb-s{display:none}
  .rank-heat{margin-left:auto}
  .store-btn{flex:1 1 auto;justify-content:center}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{justify-content:center;text-align:center}
}
@media (max-width:420px){
  .stat-band{grid-template-columns:1fr 1fr;gap:20px}
  .hero-visual .photo{transform:rotate(0)}
  .modal-box{aspect-ratio:4/3}
}

/* ---------- 23. 附加组件（内页专用） ---------- */
/* 下载页手机模型 */
.phone-mock{
  width:min(300px,74vw);aspect-ratio:9/18.6;border-radius:44px;margin:0 auto;
  background:var(--grad-night);box-shadow:var(--sh-3);
  border:8px solid #10281f;position:relative;overflow:hidden;
  transform:rotate(-3deg);
}
.phone-mock .screen{
  position:absolute;inset:0;padding:26px 18px;display:flex;flex-direction:column;gap:12px;
  background:
    radial-gradient(circle at 80% 0%,rgba(255,77,109,.3),transparent 46%),
    radial-gradient(circle at 12% 24%,rgba(14,184,127,.3),transparent 44%),
    linear-gradient(170deg,#0b2a1f,#08211a);
}
.phone-mock .notch{
  position:absolute;top:12px;left:50%;transform:translateX(-50%);
  width:96px;height:22px;border-radius:var(--r-full);background:#10281f;z-index:3;
}
.phone-mock .ph-row{display:flex;gap:9px}
.phone-mock .ph-card{
  flex:1;aspect-ratio:3/4.2;border-radius:14px;background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.12);
}
.phone-mock .ph-banner{
  aspect-ratio:16/7;border-radius:14px;background:var(--grad-melon);
  display:grid;place-items:center;color:#fff;font-weight:800;font-size:.85rem;letter-spacing:.1em;
}
.phone-mock .ph-line{height:9px;border-radius:5px;background:rgba(255,255,255,.16)}
.phone-mock .ph-line.w60{width:60%}
.phone-mock .ph-line.w85{width:85%}
/* 排行榜侧栏周榜 */
.week-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:24px;
}
.week-card h3{margin-bottom:16px}
.week-card ol{counter-reset:wk}
.week-card li{
  counter-increment:wk;display:flex;gap:12px;align-items:center;
  padding:10px 0;border-bottom:1px dashed var(--line);font-size:.9rem;
}
.week-card li:last-child{border-bottom:0}
.week-card li::before{content:counter(wk);font-weight:800;color:var(--melon);width:22px;flex:none}
.week-card li b{color:var(--ink);font-weight:600}
.week-card li .hot-n{margin-left:auto;font-size:.76rem;color:var(--ink-3);flex:none}
/* 订阅框 */
.sub-box{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px;box-shadow:var(--sh-1);
}
.sub-box form{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}
.sub-box input{
  flex:1 1 220px;padding:13px 18px;border-radius:var(--r-full);
  border:2px solid var(--line-2);background:#fff;font-size:.95rem;outline:none;
  transition:border-color .25s;
}
.sub-box input:focus{border-color:var(--brand)}
/* 文章正文排版 */
.prose{max-width:760px}
.prose h2{margin:38px 0 14px;font-size:1.4rem}
.prose h3{margin:28px 0 10px}
.prose p{margin-bottom:1.05em;color:var(--ink-2)}
.prose ul{list-style:none;margin:0 0 1.1em}
.prose ul li{padding-left:26px;position:relative;margin-bottom:.55em}
.prose ul li::before{content:"🍉";position:absolute;left:0;font-size:.85em}
.prose blockquote{
  border-left:4px solid var(--brand);background:var(--brand-soft);
  border-radius:0 var(--r-md) var(--r-md) 0;padding:16px 22px;margin:0 0 1.1em;
  color:var(--ink-2);font-size:.95rem;
}
@media (max-width:680px){
  .phone-mock{transform:rotate(0)}
}