/* ============================================================
   云漫漫画 单页官网样式表
   主题：天空青蓝云端风（天蓝 + 青绿 + 暖阳橙）
   移动优先：375px 起步，640 / 900 / 1100 逐级扩展
   ============================================================ */

:root{
  --sky-900:#0B3357;
  --sky-800:#114B7E;
  --sky-700:#1B6B9C;
  --sky-500:#2FA3DE;
  --teal-600:#0FA08F;
  --teal-500:#16B8A6;
  --sky-100:#E3F4FD;
  --sky-50:#F2FAFE;
  --sun:#FFB84D;
  --cream:#FBFEFE;
  --ink:#12344D;
  --muted:#5E7890;
  --line:rgba(22,184,166,.14);
  --radius:20px;
  --shadow:0 18px 40px rgba(22,120,150,.16);
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans CJK SC",sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--cream);line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer}

.container{width:100%;max-width:1120px;margin:0 auto;padding:0 20px}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.skip{position:absolute;left:-999px;top:8px;z-index:200;background:var(--sun);color:var(--ink);padding:10px 16px;border-radius:10px;font-weight:700;text-decoration:none}
.skip:focus{left:8px}

/* 浅色波普圆点 */
.dots{background-image:radial-gradient(rgba(47,163,222,.1) 1.2px,transparent 1.3px);background-size:16px 16px}

section{scroll-margin-top:76px}

/* ============ 通用标题 ============ */
.sec-head{max-width:640px;margin-bottom:34px}
.sec-tag{font-size:13px;font-weight:800;letter-spacing:.22em;color:var(--teal-500);text-transform:uppercase;margin-bottom:8px}
.sec-title{font-size:clamp(26px,5.4vw,40px);font-weight:900;line-height:1.2;letter-spacing:.01em}
.sec-desc{color:var(--muted);margin-top:10px;font-size:15px}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:800;font-size:16px;padding:13px 30px;border-radius:999px;text-decoration:none;transition:transform .15s ease,box-shadow .15s ease,background .15s ease;border:0;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--teal-500),var(--sky-500));color:#fff;box-shadow:0 10px 24px rgba(22,184,166,.35)}
.btn-primary:hover{background:linear-gradient(135deg,var(--teal-600),var(--sky-700));transform:translateY(-2px)}
.btn-sun{background:var(--sun);color:#fff;box-shadow:0 10px 24px rgba(255,184,77,.4)}
.btn-sun:hover{background:#ffc266;transform:translateY(-2px)}
.btn-ghost{border:2px solid rgba(27,107,156,.4);color:var(--sky-700);background:#fff}
.btn-ghost:hover{border-color:var(--teal-500);color:var(--teal-600);background:var(--sky-50)}
.btn-lg{padding:16px 44px;font-size:18px}

/* ============ 页头 ============ */
.site-header{position:sticky;top:0;z-index:100;background:rgba(251,254,254,.92);border-bottom:1px solid var(--line)}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(22,120,150,.12)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.brand-logo{width:44px;height:44px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;overflow:hidden;box-shadow:0 4px 14px rgba(22,184,166,.3);background:#fff}
.brand-logo img{width:100%;height:100%;object-fit:cover}
.brand-name{font-weight:900;font-size:20px;letter-spacing:.01em}

.nav-toggle{display:inline-flex;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;background:transparent;border:0;border-radius:10px}
.nav-toggle span{display:block;width:24px;height:3px;border-radius:2px;background:var(--sky-700);transition:transform .2s ease,opacity .2s ease}
body.nav-open .nav-toggle span:nth-child(1){transform:translateY(8px) rotate(45deg)}
body.nav-open .nav-toggle span:nth-child(2){opacity:0}
body.nav-open .nav-toggle span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

.site-nav{display:none;position:absolute;top:68px;left:0;right:0;background:var(--cream);padding:12px 20px 22px;border-bottom:1px solid var(--line);flex-direction:column;gap:4px}
body.nav-open .site-nav{display:flex}
.site-nav a{color:var(--ink);text-decoration:none;font-weight:600;padding:11px 12px;border-radius:10px;font-size:16px}
.site-nav a:hover{background:var(--sky-100);color:var(--sky-700)}
.nav-download{text-align:center;background:linear-gradient(135deg,var(--teal-500),var(--sky-500));color:#fff !important;border-radius:999px;margin-top:8px;font-weight:800}
.nav-download:hover{background:linear-gradient(135deg,var(--teal-600),var(--sky-700))}

/* ============ Hero ============ */
.hero{background:
  radial-gradient(circle at 85% 12%,rgba(255,184,77,.25),transparent 40%),
  radial-gradient(circle at 5% 90%,rgba(22,184,166,.2),transparent 42%),
  linear-gradient(160deg,var(--sky-100),#fff 62%);
  overflow:hidden;position:relative}
.cloud{position:absolute;background:#fff;border-radius:999px;opacity:.85;pointer-events:none;filter:blur(1px)}
.cloud::before,.cloud::after{content:"";position:absolute;background:#fff;border-radius:50%}
.cloud-a{width:130px;height:44px;top:14%;left:-30px}
.cloud-a::before{width:52px;height:52px;top:-26px;left:18px}
.cloud-a::after{width:36px;height:36px;top:-14px;left:66px}
.cloud-b{width:170px;height:52px;top:58%;right:-50px}
.cloud-b::before{width:64px;height:64px;top:-32px;left:26px}
.cloud-b::after{width:42px;height:42px;top:-18px;left:92px}
.cloud-c{width:100px;height:34px;bottom:10%;left:8%}
.cloud-c::before{width:40px;height:40px;top:-20px;left:14px}
.cloud-c::after{width:30px;height:30px;top:-10px;left:52px}

.hero-grid{display:grid;gap:44px;padding-top:56px;padding-bottom:72px;position:relative;z-index:1}
.hero-badge{display:inline-block;background:#fff;color:var(--teal-600);border:1px solid rgba(22,184,166,.4);font-size:13px;font-weight:800;letter-spacing:.1em;padding:8px 16px;border-radius:999px;margin-bottom:18px;box-shadow:0 6px 16px rgba(22,184,166,.16)}
.hero-title{font-size:clamp(48px,12vw,88px);font-weight:900;line-height:1.04;letter-spacing:.01em;margin-bottom:18px}
.t-main{color:var(--sky-700);-webkit-text-stroke:1.5px rgba(255,255,255,.9);text-shadow:5px 5px 0 rgba(47,163,222,.22)}
.t-sub{color:var(--ink);background:linear-gradient(transparent 58%,var(--sun) 58%);padding:0 4px}
.hero-sub{font-size:16px;color:var(--muted);max-width:460px;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:36px}
.hero-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;max-width:480px}
.stat{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px 16px;box-shadow:0 8px 20px rgba(22,120,150,.08)}
.stat dt{font-size:24px;font-weight:900;color:var(--teal-600);line-height:1.1;font-variant-numeric:tabular-nums}
.stat dd{font-size:13px;color:var(--muted);margin-top:2px}

.hero-visual{display:flex;justify-content:center;align-items:center}
.phone-wrap{position:relative;width:min(270px,70vw)}
.phone{position:relative;border-radius:32px;padding:11px;background:#0B3357;border:3px solid #2B6E9E;box-shadow:0 30px 60px rgba(11,51,87,.35)}
.phone img{width:100%;height:auto;border-radius:23px}
.chip{position:absolute;font-size:13px;font-weight:800;padding:8px 14px;border-radius:999px;box-shadow:var(--shadow)}
.chip-a{top:7%;left:-14%;background:var(--sun);color:#fff;transform:rotate(-7deg)}
.chip-b{top:44%;right:-12%;background:var(--teal-500);color:#fff;transform:rotate(5deg)}
.chip-c{bottom:8%;left:-8%;background:var(--sky-500);color:#fff;transform:rotate(-5deg)}

/* ============ 特色功能 ============ */
.features{background:var(--cream);padding:72px 0}
.feat-grid{display:grid;grid-template-columns:repeat(1,1fr);gap:16px}
.feat-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;transition:transform .18s ease,box-shadow .18s ease}
.feat-card:hover{transform:translateY(-4px);box-shadow:0 16px 32px rgba(22,120,150,.1)}
.feat-icon{width:52px;height:52px;border-radius:16px;display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--teal-500),var(--sky-500));color:#fff;margin-bottom:16px}
.feat-icon svg{width:26px;height:26px}
.feat-card h3{font-size:18px;font-weight:800;margin-bottom:8px}
.feat-card p{font-size:14px;color:var(--muted)}

/* ============ 漫画分类 ============ */
.categories{background:var(--sky-50);padding:72px 0}
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.cat-card{display:flex;flex-direction:column;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px 10px;text-decoration:none;transition:transform .18s ease,box-shadow .18s ease}
.cat-card:hover{transform:translateY(-4px);box-shadow:0 14px 28px rgba(22,120,150,.12)}
.cat-char{width:56px;height:56px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:900;color:#fff}
.cat-name{font-size:14px;font-weight:800}
.cat-card:nth-child(1) .cat-char{background:linear-gradient(135deg,#FF6B5E,#E23B2E)}
.cat-card:nth-child(2) .cat-char{background:linear-gradient(135deg,#F27BA6,#D1447C)}
.cat-card:nth-child(3) .cat-char{background:linear-gradient(135deg,#7ED957,#3FA64A)}
.cat-card:nth-child(4) .cat-char{background:linear-gradient(135deg,#8A6DF0,#6A45D8)}
.cat-card:nth-child(5) .cat-char{background:linear-gradient(135deg,#FFB84D,#F28C28)}
.cat-card:nth-child(6) .cat-char{background:linear-gradient(135deg,#F06BA8,#C2447E)}
.cat-card:nth-child(7) .cat-char{background:linear-gradient(135deg,#4D5F8F,#34456E)}
.cat-card:nth-child(8) .cat-char{background:linear-gradient(135deg,#3FA6E8,#1B6FA8)}
.cat-card:nth-child(9) .cat-char{background:linear-gradient(135deg,#7C4DFF,#4B2E8F)}
.cat-card:nth-child(10) .cat-char{background:linear-gradient(135deg,#2FA3DE,#165E8F)}
.cat-card:nth-child(11) .cat-char{background:linear-gradient(135deg,#3E3E56,#232338)}
.cat-card:nth-child(12) .cat-char{background:linear-gradient(135deg,#FFD84D,#F2A900)}

/* ============ 人气榜单 ============ */
.ranking{background:var(--cream);padding:72px 0}
.ranking-grid{display:grid;gap:40px}
.rank-list{display:flex;flex-direction:column;gap:10px}
.rank-row{display:flex;align-items:center;gap:16px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 18px;transition:transform .15s ease}
.rank-row:hover{transform:translateX(4px)}
.rank-no{font-size:22px;font-weight:900;color:var(--sky-500);font-variant-numeric:tabular-nums;min-width:44px}
.rank-row:nth-child(1) .rank-no{color:var(--sun);-webkit-text-stroke:1px var(--ink)}
.rank-name{font-weight:700;font-size:16px;flex:1}
.rank-hot{font-size:13px;color:var(--muted);font-weight:600;font-variant-numeric:tabular-nums}
.rank-quote{background:linear-gradient(135deg,var(--sky-700),var(--sky-900));color:#fff;border-radius:22px;padding:30px 26px;display:flex;flex-direction:column;align-items:flex-start;gap:16px;position:relative}
.rank-quote::after{content:"";position:absolute;bottom:-14px;left:46px;border:14px solid transparent;border-top-color:var(--sky-700);border-bottom:0}
.rank-quote p{font-size:18px;font-weight:700;line-height:1.6}
.rank-quote span{font-size:13px;color:rgba(255,255,255,.72)}

/* ============ 应用截图 ============ */
.gallery{background:var(--sky-50);padding:72px 0}
.shot-grid{display:grid;grid-template-columns:repeat(1,1fr);gap:26px;justify-items:center}
.shot-item{text-align:center}
.shot-item .phone{width:min(230px,64vw)}
.shot-item .phone img{aspect-ratio:auto}
.shot-item figcaption{color:var(--ink);font-size:14px;font-weight:700;margin-top:14px;color:var(--muted)}

/* ============ 更新手记 ============ */
.notes{background:var(--cream);padding:72px 0}
.note-grid{display:grid;grid-template-columns:repeat(1,1fr);gap:16px}
.note-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.note-card time{display:inline-block;font-size:13px;font-weight:800;color:var(--teal-600);background:var(--sky-100);padding:4px 12px;border-radius:999px;margin-bottom:12px}
.note-card h3{font-size:17px;font-weight:800;margin-bottom:8px}
.note-card p{font-size:14px;color:var(--muted)}

/* ============ 读者评价 ============ */
.reviews{background:var(--sky-50);padding:72px 0}
.review-grid{display:grid;grid-template-columns:repeat(1,1fr);gap:16px}
.review-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;gap:14px;box-shadow:0 8px 20px rgba(22,120,150,.06)}
.stars svg{display:block}
.review-card p{font-size:15px;color:var(--ink);flex:1}
.review-card footer{font-weight:800;font-size:14px;color:var(--muted)}

/* ============ 常见问题 ============ */
.faq{background:var(--cream);padding:72px 0}
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:760px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}
.faq-item summary{list-style:none;cursor:pointer;padding:18px 20px;font-weight:700;font-size:16px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;font-weight:400;color:var(--teal-500);transition:transform .2s ease}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{padding:0 20px 18px;color:var(--muted);font-size:14px;max-width:640px}

/* ============ 下载 CTA ============ */
.cta{background:
  radial-gradient(circle at 12% 18%,rgba(255,255,255,.18),transparent 36%),
  radial-gradient(circle at 88% 82%,rgba(255,184,77,.35),transparent 42%),
  linear-gradient(135deg,var(--teal-500),var(--sky-800));
  padding:80px 0;color:#fff;text-align:center}
.cta-inner{display:flex;flex-direction:column;align-items:center;gap:18px}
.cta-title{font-size:clamp(28px,6vw,46px);font-weight:900;line-height:1.15;text-shadow:3px 3px 0 rgba(11,51,87,.3)}
.cta-desc{font-size:16px;color:rgba(255,255,255,.92);max-width:520px}
.cta-chips{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:8px}
.cta-chips li{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.4);padding:7px 16px;border-radius:999px;font-size:13px;font-weight:700}

/* ============ 页脚 ============ */
.site-footer{background:var(--sky-900);color:rgba(255,255,255,.78);padding:34px 0}
.footer-inner{display:flex;flex-direction:column;align-items:center;gap:10px;text-align:center}
.site-footer .brand{color:#fff;font-size:16px}
.site-footer .brand-logo{width:36px;height:36px;border-radius:12px}
.footer-slogan{font-size:13px;color:rgba(255,255,255,.62)}
.footer-copy{font-size:12px;color:rgba(255,255,255,.48)}

/* ============ 焦点可见 ============ */
:focus-visible{outline:2px solid var(--teal-500);outline-offset:2px}

/* ============ 动效偏好 ============ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none !important;animation:none !important}
}

/* ============ 响应式：640px ============ */
@media (min-width:640px){
  .hero-stats{grid-template-columns:repeat(4,1fr)}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .cat-grid{grid-template-columns:repeat(4,1fr)}
  .note-grid{grid-template-columns:repeat(3,1fr)}
  .review-grid{grid-template-columns:repeat(3,1fr)}
  .shot-grid{grid-template-columns:repeat(3,1fr)}
}

/* ============ 响应式：900px ============ */
@media (min-width:900px){
  .nav-toggle{display:none}
  .site-nav{display:flex;position:static;background:transparent;border:0;padding:0;flex-direction:row;align-items:center;gap:6px}
  .site-nav a{padding:9px 13px;font-size:15px}
  .nav-download{background:linear-gradient(135deg,var(--teal-500),var(--sky-500));color:#fff !important;margin-top:0;padding:10px 22px}
  .hero-grid{grid-template-columns:1.1fr .9fr;align-items:center;padding-top:72px;padding-bottom:88px}
  .feat-grid{grid-template-columns:repeat(3,1fr)}
  .ranking-grid{grid-template-columns:1.25fr .75fr;align-items:start}
  .cat-grid{grid-template-columns:repeat(6,1fr)}
  section{scroll-margin-top:84px}
}

/* ============ 响应式：1100px ============ */
@media (min-width:1100px){
  .container{padding:0 32px}
  .hero-sub{font-size:18px}
}