/* ===== 海棠文学城 · haitangwenxue.cn =====
   主题：白底 + 亮绿(#a2fe90) + 亮蓝(#79acfe) + 衬线书卷气
   色彩源自官方logo图片主色调
   移动端：5级断点 340 / 380 / 480 / 768 / 1023
   =========================================== */

:root{
  --c-bg:#ffffff;             /* 纯白底（呼应logo白色背景） */
  --c-bg-2:#f3faf0;           /* 淡绿米白 */
  --c-card:#ffffff;
  --c-border:rgba(121,172,254,0.18);
  --c-text:#1f2937;           /* 深蓝灰文字 */
  --c-text-2:#6b7280;         /* 次要文字 */
  --c-green:#22c55e;          /* 亮绿主色（源自logo #a2fe90） */
  --c-green-d:#16a34a;        /* 深绿 */
  --c-green-l:#4ade80;        /* 浅绿 */
  --c-green-xl:#a2fe90;       /* logo亮绿原色 */
  --c-blue:#3b82f6;           /* 亮蓝主色（源自logo #79acfe） */
  --c-blue-d:#2563eb;         /* 深蓝 */
  --c-blue-l:#60a5fa;         /* 浅蓝 */
  --c-blue-xl:#79acfe;        /* logo亮蓝原色 */
  --c-amber:#b45309;          /* 琥珀点缀 */
  --c-cream:#fef9c3;          /* 奶油黄 */
  --grad-main:linear-gradient(135deg,#22c55e 0%,#3b82f6 100%);          /* 绿到蓝主渐变 */
  --grad-green:linear-gradient(135deg,#16a34a 0%,#22c55e 50%,#4ade80 100%);
  --grad-blue:linear-gradient(135deg,#2563eb 0%,#3b82f6 50%,#60a5fa 100%);
  --grad-logo:linear-gradient(135deg,#a2fe90 0%,#79acfe 100%);          /* logo双色渐变 */
  --grad-hero:radial-gradient(circle at 20% 30%,rgba(162,254,144,0.18),transparent 60%),radial-gradient(circle at 80% 70%,rgba(121,172,254,0.18),transparent 55%);
  --radius:14px;
  --radius-sm:10px;
  --nav-h:68px;
  --topbar-h:38px;
  --float-h:76px;
}

/* ===== Reset ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"Songti SC","STSong","Noto Serif SC",Georgia,"Source Han Serif SC","PingFang SC","Microsoft YaHei",serif;
  background:var(--c-bg);
  color:var(--c-text);
  line-height:1.75;
  font-size:16px;
  overflow-x:hidden;
  padding-top:calc(var(--topbar-h) + var(--nav-h));
  padding-bottom:calc(var(--float-h) + env(safe-area-inset-bottom,0));
}
a{color:inherit;text-decoration:none;transition:color .2s}
a:hover{color:var(--c-blue)}
img{max-width:100%;height:auto;display:block}
button{cursor:pointer;font-family:inherit;border:none;background:none}
ul,ol{list-style:none}
svg{display:block}

/* ===== Skip Link ===== */
.skip-link{position:absolute;left:-9999px;top:0;background:var(--c-blue);color:#fff;padding:10px 16px;z-index:999;border-radius:0 0 8px 0}
.skip-link:focus{left:0}

/* ===== Topbar 公告条 ===== */
.topbar{
  position:fixed;top:0;left:0;right:0;z-index:60;
  height:var(--topbar-h);
  background:var(--grad-main);
  color:var(--c-cream);
  font-size:13px;
  box-shadow:0 1px 0 rgba(255,255,255,0.08);
}
.topbar-inner{
  max-width:1280px;margin:0 auto;
  height:100%;padding:0 24px;
  display:flex;align-items:center;gap:12px;
}
.topbar-tag{
  background:rgba(255,255,255,0.18);
  padding:3px 10px;border-radius:6px;
  font-size:11px;flex-shrink:0;font-weight:600;letter-spacing:1px;
}
.topbar-text{
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  flex:1;opacity:0.95;
}

/* ===== Header ===== */
.header{
  position:fixed;top:var(--topbar-h);left:0;right:0;z-index:55;
  height:var(--nav-h);
  background:rgba(253,248,243,0.92);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--c-border);
}
.nav{
  max-width:1280px;margin:0 auto;
  height:100%;padding:0 24px;
  display:flex;align-items:center;gap:20px;
}
.brand{
  display:flex;align-items:center;gap:10px;
  margin-right:auto;
}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text strong{font-size:18px;font-weight:900;color:var(--c-blue-d);letter-spacing:1px}
.brand-text small{font-size:11px;color:var(--c-text-2);letter-spacing:0.5px}

.nav-list{display:none;align-items:center;gap:4px}
.nav-list a{
  display:block;padding:8px 14px;font-size:15px;color:var(--c-text);
  border-radius:8px;font-weight:500;
}
.nav-list a:hover{background:var(--c-bg-2);color:var(--c-blue-d)}

.btn-download{
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 18px;border-radius:10px;
  background:var(--grad-main);color:#fff !important;
  font-size:14px;font-weight:700;
  box-shadow:0 4px 14px rgba(59,130,246,0.35);
  flex-shrink:0;min-height:44px;
}
.btn-download svg{flex-shrink:0}

.menu-btn{
  display:none;width:44px;height:44px;border-radius:8px;
  background:var(--c-bg-2);color:var(--c-blue-d);
  font-size:22px;align-items:center;justify-content:center;
}

/* ===== Mobile Drawer ===== */
.drawer{
  position:fixed;top:calc(var(--topbar-h) + var(--nav-h));right:0;
  width:280px;max-width:85vw;height:calc(100vh - var(--topbar-h) - var(--nav-h));
  background:var(--c-card);
  box-shadow:-8px 0 32px rgba(37,99,235,0.15);
  transform:translateX(100%);
  transition:transform .3s ease;
  z-index:54;padding:16px 12px;
  overflow-y:auto;
  border-left:1px solid var(--c-border);
}
.drawer.open{transform:translateX(0)}
.drawer a{
  display:block;padding:14px 16px;font-size:16px;
  color:var(--c-text);border-radius:10px;margin-bottom:4px;
  border-bottom:1px solid var(--c-border);
  min-height:48px;display:flex;align-items:center;
}
.drawer a:hover,.drawer a:active{background:var(--c-bg-2);color:var(--c-blue-d)}
.drawer .drawer-dl{
  background:var(--grad-main);color:#fff !important;
  text-align:center;justify-content:center;margin-top:12px;
  border-bottom:none;font-weight:700;
}

/* ===== Container / Section ===== */
.container{max-width:1280px;margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section-head{margin-bottom:48px}
.head-center{text-align:center}
.head-left{margin-left:0}
.eyebrow{
  display:inline-block;font-size:13px;letter-spacing:3px;
  color:var(--c-blue);font-weight:700;
  text-transform:uppercase;
  padding:4px 12px;background:rgba(59,130,246,0.08);
  border-radius:20px;margin-bottom:14px;
}
.section-title{
  font-size:32px;font-weight:900;color:var(--c-text);
  line-height:1.25;margin-bottom:12px;letter-spacing:0.5px;
}
.section-desc{
  font-size:15px;color:var(--c-text-2);
  max-width:680px;line-height:1.8;
}
.head-center .section-desc{margin:0 auto}

/* ===== Hero 区 ===== */
.hero{
  background:var(--c-bg);
  background-image:var(--grad-hero);
  padding:48px 0 64px;
  position:relative;
  overflow:hidden;
}
.hero::before{
  content:"";position:absolute;
  top:-100px;right:-50px;
  width:300px;height:300px;
  background:radial-gradient(circle,rgba(34,197,94,0.08),transparent 70%);
  pointer-events:none;
}
.hero-grid{
  max-width:1280px;margin:0 auto;padding:0 24px;
  display:grid;grid-template-columns:1.1fr 0.9fr;
  gap:60px;align-items:center;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:20px;
  background:rgba(22,163,74,0.10);color:var(--c-green);
  font-size:13px;font-weight:600;
  margin-bottom:18px;
}
.badge-dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--c-green);animation:pulse 2s infinite;
}
@keyframes pulse{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:0.5;transform:scale(0.8)}
}
.hero-title{margin-bottom:18px}
.title-main{
  display:block;font-size:54px;font-weight:900;
  background:var(--grad-main);
  -webkit-background-clip:text;background-clip:text;
  color:transparent;letter-spacing:2px;line-height:1.15;
}
.title-sub{
  display:block;font-size:22px;color:var(--c-text-2);
  font-weight:400;margin-top:8px;letter-spacing:2px;
}
.hero-desc{
  font-size:16px;line-height:1.95;color:var(--c-text);
  margin-bottom:28px;max-width:560px;
}
.hero-desc b,.hero-desc strong{color:var(--c-blue-d);font-weight:700}

.hero-actions{
  display:flex;gap:14px;flex-wrap:wrap;margin-bottom:36px;
}
.btn-primary,.btn-ghost{
  display:inline-flex;align-items:center;gap:12px;
  padding:14px 24px;border-radius:12px;
  font-size:15px;font-weight:600;
  min-height:54px;transition:transform .15s,box-shadow .2s;
}
.btn-primary{
  background:var(--grad-main);color:#fff !important;
  box-shadow:0 8px 24px rgba(59,130,246,0.30);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(59,130,246,0.40)}
.btn-ghost{
  background:var(--c-card);color:var(--c-text) !important;
  border:2px solid var(--c-border);
}
.btn-ghost:hover{border-color:var(--c-blue);color:var(--c-blue-d) !important}
.btn-icon{
  width:32px;height:32px;border-radius:8px;
  background:rgba(255,255,255,0.20);
  display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:700;flex-shrink:0;
}
.btn-ghost .btn-icon{background:var(--c-bg-2);color:var(--c-blue)}
.btn-text{display:flex;flex-direction:column;line-height:1.2;text-align:left}
.btn-text strong{font-size:16px;font-weight:700}
.btn-text small{font-size:12px;opacity:0.85;margin-top:2px}

.hero-meta{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:14px;max-width:560px;
}
.meta-item{
  background:var(--c-card);
  border:1px solid var(--c-border);
  padding:14px 12px;border-radius:12px;
  text-align:center;
}
.meta-item b{
  display:block;font-size:22px;font-weight:900;
  color:var(--c-blue-d);font-family:Georgia,serif;
}
.meta-item span{font-size:12px;color:var(--c-text-2)}

/* ===== Hero 手机mockup ===== */
.hero-right{position:relative;display:flex;justify-content:center}
.phone-mockup{
  width:280px;
  background:linear-gradient(180deg,#1e3a5f,#1f2937);
  border-radius:36px;padding:8px;
  box-shadow:0 30px 60px rgba(37,99,235,0.30),0 12px 24px rgba(0,0,0,0.15);
  position:relative;
}
.phone-notch{
  position:absolute;top:8px;left:50%;transform:translateX(-50%);
  width:80px;height:18px;background:#0f172a;
  border-radius:0 0 14px 14px;z-index:2;
}
.phone-screen{
  background:var(--c-bg);
  border-radius:30px;overflow:hidden;
  min-height:480px;
}
.screen-header{
  display:flex;align-items:center;gap:8px;
  padding:14px 16px;background:var(--grad-main);color:#fff;
}
.screen-logo{
  width:28px;height:28px;border-radius:6px;
  background:rgba(255,255,255,0.20);
  display:flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:900;color:var(--c-cream);
  object-fit:cover;
}
.brand-mark{
  width:38px;height:38px;border-radius:10px;
  background:var(--grad-main);
  display:flex;align-items:center;justify-content:center;
  font-size:22px;font-weight:900;color:var(--c-cream);
  box-shadow:0 4px 12px rgba(59,130,246,0.30);
  flex-shrink:0;
  object-fit:cover;
}
.screen-title{font-size:14px;font-weight:700;flex:1}
.screen-menu{font-size:18px;opacity:0.8}
.screen-search{
  display:flex;align-items:center;gap:8px;
  padding:10px 14px;margin:12px;
  background:var(--c-bg-2);border-radius:10px;
  font-size:12px;color:var(--c-text-2);
}
.search-ico{font-size:14px}
.screen-tags{
  display:flex;gap:6px;flex-wrap:wrap;
  padding:0 12px;margin-bottom:12px;
}
.screen-tags span{
  font-size:11px;padding:3px 8px;
  background:rgba(59,130,246,0.10);color:var(--c-blue-d);
  border-radius:10px;
}
.screen-list{padding:0 12px}
.list-item{
  display:flex;gap:10px;padding:10px 0;
  border-bottom:1px solid var(--c-border);
}
.list-item:last-child{border-bottom:none}
.list-cover{
  width:42px;height:58px;border-radius:6px;flex-shrink:0;
}
.cover-1{background:linear-gradient(135deg,#3b82f6,#2563eb)}
.cover-2{background:linear-gradient(135deg,#16a34a,#15803d)}
.cover-3{background:linear-gradient(135deg,#a2fe90,#79acfe)}
.list-meta{display:flex;flex-direction:column;gap:2px;font-size:11px}
.list-meta strong{font-size:13px;color:var(--c-text);font-weight:700}
.list-meta small{color:var(--c-text-2)}
.list-meta em{color:var(--c-blue-d);font-style:normal;font-size:10px}
.screen-tabbar{
  display:flex;border-top:1px solid var(--c-border);
  padding:8px 0;margin-top:12px;
}
.screen-tabbar .tab{
  flex:1;text-align:center;font-size:11px;
  color:var(--c-text-2);padding:6px 0;
}
.screen-tabbar .tab.active{color:var(--c-blue-d);font-weight:700}

.phone-float{
  position:absolute;background:var(--c-card);
  padding:10px 14px;border-radius:14px;
  box-shadow:0 12px 28px rgba(0,0,0,0.15);
  display:flex;flex-direction:column;align-items:center;
  font-size:11px;gap:2px;
  border:1px solid var(--c-border);
}
.phone-float b{font-size:14px;color:var(--c-blue-d);font-weight:900}
.phone-float small{color:var(--c-text-2);font-size:10px}
.phone-float span{font-size:18px}
.float-1{top:30px;left:-20px}
.float-2{bottom:60px;right:-15px}

/* ===== 官网入口区 ===== */
.entrance{background:var(--c-bg)}
.entrance-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:18px;
}
.entrance-card{
  position:relative;
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
  padding:28px 24px;
  display:flex;gap:16px;align-items:flex-start;
  transition:transform .2s,box-shadow .2s,border-color .2s;
  overflow:hidden;
}
.entrance-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:var(--grad-main);opacity:0;
  transition:opacity .2s;
}
.entrance-card:hover{
  transform:translateY(-4px);
  box-shadow:0 16px 36px rgba(37,99,235,0.12);
  border-color:rgba(59,130,246,0.30);
}
.entrance-card:hover::before{opacity:1}
.entrance-card.primary{
  background:var(--grad-main);color:#fff;
}
.entrance-card.primary h3,.entrance-card.primary p,.entrance-card.primary .entrance-link{color:#fff}
.entrance-num{
  width:48px;height:48px;flex-shrink:0;
  border-radius:12px;
  background:var(--c-bg-2);color:var(--c-blue-d);
  display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:900;font-family:Georgia,serif;
}
.entrance-card.primary .entrance-num{
  background:rgba(255,255,255,0.20);color:#fff;
}
.entrance-body{flex:1}
.entrance-body h3{font-size:18px;font-weight:700;margin-bottom:6px;color:var(--c-text)}
.entrance-body p{font-size:14px;color:var(--c-text-2);line-height:1.7;margin-bottom:8px}
.entrance-link{font-size:13px;color:var(--c-blue-d);font-weight:700}
.entrance-badge{
  position:absolute;top:14px;right:14px;
  background:var(--c-cream);color:var(--c-blue-d);
  font-size:11px;padding:3px 8px;border-radius:6px;font-weight:700;
}
.entrance-card.primary .entrance-badge{background:rgba(255,255,255,0.25);color:#fff}

/* ===== APP 下载区 ===== */
.app-section{background:var(--c-bg-2)}
.app-grid{
  display:grid;grid-template-columns:0.8fr 1.2fr;
  gap:48px;align-items:center;
}
.app-showcase{display:flex;justify-content:center}
.phone-mini{
  width:240px;background:#1e3a5f;
  border-radius:28px;padding:6px;
  box-shadow:0 24px 48px rgba(0,0,0,0.20);
}
.mini-screen{
  background:var(--c-bg);border-radius:24px;
  overflow:hidden;min-height:380px;
  display:flex;flex-direction:column;
}
.mini-banner{
  background:var(--c-blue);color:#fff;
  padding:8px 14px;font-size:12px;text-align:center;
}
.mini-content{padding:14px;flex:1}
.mini-content h4{font-size:15px;color:var(--c-text);margin-bottom:10px;font-weight:700}
.mini-content p{
  font-size:13px;color:var(--c-text);line-height:1.85;
  margin-bottom:8px;text-indent:2em;
}
.mini-toolbar{
  display:flex;justify-content:space-around;
  padding:10px 0;border-top:1px solid var(--c-border);
  background:var(--c-bg-2);
}
.mini-toolbar span{
  font-size:18px;color:var(--c-text-2);
  width:36px;height:36px;border-radius:8px;
  display:flex;align-items:center;justify-content:center;
}
.mini-toolbar span.active{background:var(--c-blue);color:#fff}

.app-info{display:flex;flex-direction:column;gap:24px}
.info-row{display:flex;gap:16px;align-items:flex-start}
.info-icon{
  width:52px;height:52px;flex-shrink:0;
  background:var(--c-bg);border:1px solid var(--c-border);
  border-radius:14px;display:flex;align-items:center;justify-content:center;
  font-size:24px;
}
.info-row h4{font-size:17px;color:var(--c-text);margin-bottom:6px;font-weight:700}
.info-row p{font-size:14px;color:var(--c-text-2);line-height:1.7}

.app-download{margin-top:8px}
.btn-primary.big{padding:18px 28px;min-height:64px}
.btn-primary.big .btn-icon{width:36px;height:36px;font-size:20px}
.download-badges{
  display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;
}
.badge-os{
  font-size:12px;padding:4px 10px;border-radius:6px;
  background:var(--c-bg);color:var(--c-green);
  border:1px solid var(--c-border);font-weight:600;
}

/* ===== 功能特色 ===== */
.features{background:var(--c-bg)}
.feature-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
}
.feature-card{
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
  padding:28px 24px;
  position:relative;
  transition:transform .2s,box-shadow .2s;
}
.feature-card:hover{
  transform:translateY(-4px);
  box-shadow:0 16px 36px rgba(37,99,235,0.10);
}
.feature-num{
  position:absolute;top:20px;right:24px;
  font-size:36px;font-weight:900;color:rgba(59,130,246,0.12);
  font-family:Georgia,serif;letter-spacing:1px;
}
.feature-card h3{font-size:19px;color:var(--c-text);margin-bottom:10px;font-weight:700}
.feature-card p{font-size:14px;color:var(--c-text-2);line-height:1.8;margin-bottom:14px}
.feature-tags{display:flex;gap:6px;flex-wrap:wrap}
.feature-tags span{
  font-size:12px;padding:3px 10px;border-radius:12px;
  background:var(--c-bg-2);color:var(--c-blue-d);
}

/* ===== 小说分类 ===== */
.categories{background:var(--c-bg-2)}
.cat-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
}
.cat-card{
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
  padding:24px 18px;text-align:center;
  transition:transform .2s,box-shadow .2s,border-color .2s;
  position:relative;overflow:hidden;
}
.cat-card:hover{
  transform:translateY(-4px);
  box-shadow:0 12px 28px rgba(37,99,235,0.10);
  border-color:var(--c-blue);
}
.cat-emoji{
  font-size:36px;margin-bottom:10px;
  display:flex;align-items:center;justify-content:center;
  height:50px;
}
.cat-card h3{font-size:16px;color:var(--c-text);margin-bottom:6px;font-weight:700}
.cat-card p{font-size:12px;color:var(--c-text-2);line-height:1.6;margin-bottom:10px}
.cat-count{
  display:inline-block;font-size:11px;
  padding:3px 10px;border-radius:10px;
  background:rgba(22,163,74,0.10);color:var(--c-green);
  font-weight:600;
}
.cat-1 .cat-emoji{background:linear-gradient(135deg,rgba(34,197,94,0.15),transparent)}      /* 言情 - 绿 */
.cat-2 .cat-emoji{background:linear-gradient(135deg,rgba(59,130,246,0.15),transparent)}     /* 玄幻 - 蓝 */
.cat-3 .cat-emoji{background:linear-gradient(135deg,rgba(96,165,250,0.15),transparent)}     /* 悬疑 - 浅蓝 */
.cat-4 .cat-emoji{background:linear-gradient(135deg,rgba(22,163,74,0.15),transparent)}      /* 修仙 - 深绿 */
.cat-5 .cat-emoji{background:linear-gradient(135deg,rgba(162,254,144,0.20),transparent)}   /* 都市 - logo亮绿 */
.cat-6 .cat-emoji{background:linear-gradient(135deg,rgba(121,172,254,0.20),transparent)}   /* 古代 - logo亮蓝 */
.cat-7 .cat-emoji{background:linear-gradient(135deg,rgba(37,99,235,0.15),transparent)}     /* 科幻 - 深蓝 */
.cat-8 .cat-emoji{background:linear-gradient(135deg,rgba(74,222,128,0.15),transparent)}    /* 同人 - 浅绿 */

/* ===== 时间线教程 ===== */
.guide{background:var(--c-bg)}
.timeline{
  position:relative;padding-left:48px;
  max-width:820px;margin:0 auto;
}
.timeline::before{
  content:"";position:absolute;
  left:18px;top:8px;bottom:8px;width:2px;
  background:linear-gradient(180deg,var(--c-blue) 0%,var(--c-blue-l) 50%,var(--c-blue-d) 100%);
}
.tl-step{position:relative;margin-bottom:32px}
.tl-step:last-child{margin-bottom:0}
.tl-num{
  position:absolute;left:-48px;top:0;
  width:38px;height:38px;border-radius:50%;
  background:var(--c-card);border:2px solid var(--c-blue);
  color:var(--c-blue-d);
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:900;font-family:Georgia,serif;
  z-index:1;
}
.tl-body{
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
  padding:22px 24px;
  transition:transform .2s,box-shadow .2s;
}
.tl-body:hover{
  transform:translateX(4px);
  box-shadow:0 12px 28px rgba(37,99,235,0.10);
}
.tl-body h3{font-size:18px;color:var(--c-text);margin-bottom:8px;font-weight:700}
.tl-body p{font-size:14px;color:var(--c-text-2);line-height:1.8}
.tl-tag{
  display:inline-block;margin-top:10px;
  font-size:12px;padding:3px 10px;border-radius:10px;
  background:rgba(22,163,74,0.10);color:var(--c-green);
  font-weight:600;
}

/* ===== 更新日志 ===== */
.updates{background:var(--c-bg)}
.updates-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:16px;
}
.update-card{
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
  padding:22px 20px;
  position:relative;
}
.update-tag{
  display:inline-block;font-size:11px;padding:3px 10px;
  border-radius:6px;font-weight:700;margin-bottom:10px;
}
.update-tag.new{background:rgba(22,163,74,0.12);color:var(--c-green)}
.update-tag.opt{background:rgba(59,130,246,0.12);color:var(--c-blue-d)}
.update-tag.fix{background:rgba(121,172,254,0.18);color:var(--c-blue-d)}
.update-card h4{font-size:16px;color:var(--c-text);margin-bottom:8px;font-weight:700}
.update-card p{font-size:13px;color:var(--c-text-2);line-height:1.7}

/* ===== 标签云 ===== */
.tagcloud{background:var(--c-bg-2)}
.tags-box{
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
  padding:36px 30px;
  display:flex;flex-wrap:wrap;gap:10px;
  align-items:center;
}
.tag{
  display:inline-flex;align-items:center;justify-content:center;
  padding:6px 14px;border-radius:18px;
  background:var(--c-bg-2);color:var(--c-text-2);
  font-size:13px;transition:all .2s;
  min-height:32px;
}
.tag:hover{
  background:var(--c-blue);color:#fff;
  transform:translateY(-1px);
  box-shadow:0 4px 12px rgba(59,130,246,0.30);
}
.tag-lg{
  font-size:14px;padding:8px 16px;font-weight:600;
  background:rgba(59,130,246,0.10);color:var(--c-blue-d);
  min-height:36px;
}
.tag-xl{
  font-size:15px;padding:10px 18px;font-weight:700;
  background:var(--grad-main);color:#fff;
  min-height:40px;border-radius:20px;
  box-shadow:0 4px 12px rgba(59,130,246,0.25);
}
.tag-sm{font-size:12px;padding:5px 10px;min-height:30px;background:var(--c-bg);border:1px solid var(--c-border)}

/* ===== 用户评价 ===== */
.reviews{background:var(--c-bg)}
.reviews-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
}
.review-card{
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
  padding:26px 24px;
  transition:transform .2s,box-shadow .2s;
}
.review-card:hover{
  transform:translateY(-4px);
  box-shadow:0 16px 36px rgba(37,99,235,0.10);
}
.review-stars{font-size:18px;color:#f59e0b;margin-bottom:14px;letter-spacing:2px}
.review-text{
  font-size:15px;color:var(--c-text);line-height:1.85;
  margin-bottom:18px;font-style:italic;
}
.review-user{display:flex;align-items:center;gap:12px}
.user-avatar{
  width:44px;height:44px;border-radius:50%;
  background:var(--grad-main);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:900;
}
.review-user strong{display:block;font-size:14px;color:var(--c-text)}
.review-user small{font-size:12px;color:var(--c-text-2)}

/* ===== FAQ ===== */
.faq{background:var(--c-bg-2)}
.faq-list{
  max-width:880px;margin:0 auto;
  display:grid;grid-template-columns:repeat(2,1fr);gap:14px;
}
.faq-item{
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
  overflow:hidden;
  transition:box-shadow .2s;
}
.faq-item:hover{box-shadow:0 8px 20px rgba(37,99,235,0.08)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 20px;font-size:15px;font-weight:700;
  color:var(--c-text);cursor:pointer;
  list-style:none;min-height:56px;
  position:relative;
}
.faq-q::-webkit-details-marker{display:none}
.faq-q::after{
  content:"+";font-size:22px;color:var(--c-blue);
  font-weight:400;transition:transform .2s;
  position:absolute;right:20px;top:50%;transform:translateY(-50%);
}
details[open] .faq-q::after{transform:translateY(-50%) rotate(45deg)}
.faq-a{padding:0 20px 16px}
.faq-a p{font-size:14px;color:var(--c-text-2);line-height:1.8}

/* ===== CTA 底部 ===== */
.cta-final{background:var(--c-bg)}
.cta-box{
  background:var(--grad-main);
  border-radius:24px;
  padding:56px 48px;
  display:flex;align-items:center;justify-content:space-between;
  gap:36px;flex-wrap:wrap;
  position:relative;overflow:hidden;
}
.cta-box::before{
  content:"海";position:absolute;
  top:50%;right:8%;transform:translateY(-50%);
  font-size:240px;font-weight:900;
  color:rgba(255,255,255,0.06);
  font-family:Georgia,serif;
  pointer-events:none;
}

/* ===== 平台对比区 ===== */
.platforms{background:var(--c-bg)}
.platform-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:18px;
  margin-bottom:36px;
}
.platform-card{
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
  padding:24px 22px;
  position:relative;
  transition:transform .2s,box-shadow .2s;
}
.platform-card:hover{
  transform:translateY(-4px);
  box-shadow:0 16px 36px rgba(37,99,235,0.10);
}
.platform-card.primary{
  background:var(--grad-main);color:#fff;
  border:none;
}
.platform-head{
  display:flex;align-items:center;gap:12px;
  margin-bottom:18px;padding-bottom:14px;
  border-bottom:1px solid var(--c-border);
  position:relative;
}
.platform-card.primary .platform-head{border-bottom-color:rgba(255,255,255,0.20)}
.platform-logo{
  width:48px;height:48px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-size:22px;font-weight:900;color:#fff;
  flex-shrink:0;
}
.platform-head h3{font-size:17px;color:var(--c-text);font-weight:700;margin-bottom:2px}
.platform-card.primary .platform-head h3{color:#fff}
.platform-head small{font-size:12px;color:var(--c-text-2)}
.platform-card.primary .platform-head small{color:rgba(255,255,255,0.85)}
.platform-badge{
  position:absolute;top:0;right:0;
  background:var(--c-cream);color:var(--c-blue-d);
  font-size:11px;padding:3px 10px;border-radius:6px;
  font-weight:700;
}
.platform-card.primary .platform-badge{background:rgba(255,255,255,0.25);color:#fff}
.platform-list{
  display:grid;grid-template-columns:auto 1fr;
  gap:6px 14px;margin:0;
}
.platform-list dt{
  font-size:12px;color:var(--c-text-2);
  font-weight:600;letter-spacing:0.5px;
  padding:4px 0;
}
.platform-card.primary .platform-list dt{color:rgba(255,255,255,0.70)}
.platform-list dd{
  font-size:13px;color:var(--c-text);
  padding:4px 0;line-height:1.5;
}
.platform-card.primary .platform-list dd{color:#fff}
.platform-summary{
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
  padding:24px 26px;
  border-left:4px solid var(--c-blue);
}
.platform-summary h3{
  font-size:18px;color:var(--c-text);
  font-weight:700;margin-bottom:10px;
}
.platform-summary p{
  font-size:14px;color:var(--c-text-2);
  line-height:1.8;
}
.platform-summary b{color:var(--c-blue-d);font-weight:700}

/* ===== 进阶技巧区 ===== */
.tips{background:var(--c-bg-2)}
.tips-grid{
  display:grid;grid-template-columns:repeat(5,1fr);gap:14px;
}
.tip-card{
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
  padding:22px 18px;
  position:relative;
  transition:transform .2s,box-shadow .2s;
}
.tip-card:hover{
  transform:translateY(-4px);
  box-shadow:0 12px 28px rgba(37,99,235,0.10);
}
.tip-num{
  font-size:32px;font-weight:900;
  color:rgba(59,130,246,0.12);
  font-family:Georgia,serif;
  margin-bottom:6px;line-height:1;
}
.tip-card h4{
  font-size:15px;color:var(--c-text);
  font-weight:700;margin-bottom:8px;
}
.tip-card p{
  font-size:13px;color:var(--c-text-2);
  line-height:1.7;
}
.tip-card code{
  font-family:Consolas,Monaco,monospace;
  font-size:12px;padding:1px 6px;
  background:var(--c-bg-2);color:var(--c-blue-d);
  border-radius:4px;
}

.cta-text{flex:1;min-width:260px}
.cta-eyebrow{
  display:inline-block;font-size:13px;letter-spacing:2px;
  color:var(--c-cream);margin-bottom:10px;font-weight:600;
}
.cta-text h2{font-size:32px;color:#fff;margin-bottom:10px;font-weight:900}
.cta-text p{font-size:15px;color:rgba(255,255,255,0.85)}

/* ===== Footer ===== */
.footer{
  background:#1e3a5f;color:rgba(255,255,255,0.80);
  padding:0 0 20px;
}
.footer-inner{
  max-width:1280px;margin:0 auto;padding:56px 24px 24px;
}
.foot-top{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:36px;margin-bottom:36px;padding-bottom:28px;
  border-bottom:1px solid rgba(255,255,255,0.10);
}
.foot-logo{
  width:48px;height:48px;border-radius:12px;
  background:var(--grad-main);
  display:flex;align-items:center;justify-content:center;
  font-size:26px;font-weight:900;color:var(--c-cream);
  margin-bottom:14px;
  object-fit:cover;
  box-shadow:0 4px 12px rgba(0,0,0,0.20);
}
.foot-desc{font-size:13px;line-height:1.8;margin-bottom:10px;color:rgba(255,255,255,0.70)}
.foot-tip{font-size:12px;color:rgba(255,255,255,0.55);font-style:italic}
.foot-col h5{
  font-size:14px;color:#fff;margin-bottom:14px;font-weight:700;
  letter-spacing:1px;
}
.foot-col li,.foot-col a{margin-bottom:10px;font-size:13px;display:block}
.foot-col li a{padding:4px 0;color:rgba(255,255,255,0.70);min-height:32px;display:flex;align-items:center}
.foot-col li a:hover{color:var(--c-blue-l)}
.kw-list{display:flex;flex-wrap:wrap;gap:6px}
.kw-list a{
  display:inline-flex;padding:4px 9px;font-size:11px;
  background:rgba(255,255,255,0.06);border-radius:6px;
  color:rgba(255,255,255,0.75);min-height:28px;
  align-items:center;
}
.kw-list a:hover{background:var(--c-blue);color:#fff}
.foot-bottom{
  display:flex;justify-content:space-between;
  flex-wrap:wrap;gap:10px;
  font-size:12px;color:rgba(255,255,255,0.50);
}

/* ===== 悬浮下载底栏 ===== */
.float-dl{
  position:fixed;left:0;right:0;bottom:0;z-index:50;
  height:var(--float-h);
  background:rgba(253,248,243,0.96);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  border-top:1px solid var(--c-border);
  box-shadow:0 -4px 24px rgba(37,99,235,0.10);
  padding:0 16px;
  padding-bottom:env(safe-area-inset-bottom,0);
}
.float-dl-inner{
  max-width:1280px;margin:0 auto;height:100%;
  display:flex;align-items:center;gap:14px;
  padding:0 8px;
}
.float-logo{
  width:44px;height:44px;border-radius:10px;
  background:var(--grad-main);color:var(--c-cream);
  display:flex;align-items:center;justify-content:center;
  font-size:22px;font-weight:900;flex-shrink:0;
  object-fit:cover;
  box-shadow:0 4px 12px rgba(59,130,246,0.30);
}
.float-info{flex:1;display:flex;flex-direction:column;line-height:1.2;min-width:0}
.float-name{font-size:14px;font-weight:700;color:var(--c-text)}
.float-sub{font-size:11px;color:var(--c-text-2)}
.float-btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:12px 24px;border-radius:10px;
  background:var(--grad-main);color:#fff !important;
  font-size:14px;font-weight:700;
  box-shadow:0 4px 14px rgba(59,130,246,0.30);
  min-height:44px;flex-shrink:0;
}

/* ===== 返回顶部 ===== */
.back-top{
  position:fixed;bottom:calc(var(--float-h) + 16px);right:16px;z-index:49;
  width:44px;height:44px;border-radius:50%;
  background:var(--c-blue);color:#fff;
  font-size:22px;font-weight:700;
  box-shadow:0 6px 20px rgba(59,130,246,0.35);
  display:flex;align-items:center;justify-content:center;
}

/* ===== 响应式 · 平板 ===== */
@media(min-width:769px) and (max-width:1023px){
  .hero-grid{gap:32px}
  .title-main{font-size:42px}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .cat-grid{grid-template-columns:repeat(4,1fr)}
  .updates-grid{grid-template-columns:repeat(2,1fr)}
  .reviews-grid{grid-template-columns:repeat(2,1fr)}
  .platform-grid{grid-template-columns:repeat(2,1fr)}
  .tips-grid{grid-template-columns:repeat(3,1fr)}
  .nav-list{display:flex !important}
  .menu-btn{display:none}
}

/* ===== 响应式 · 桌面 ===== */
@media(min-width:1024px){
  .nav-list{display:flex}
  .menu-btn{display:none}
}

/* ===== 响应式 · 中屏手机 481-768px ===== */
@media(min-width:481px) and (max-width:768px){
  :root{--topbar-h:36px;--nav-h:62px}
  .topbar{font-size:12.5px}
  .topbar-tag{font-size:11px;flex-shrink:0}
  .topbar-text{font-size:12px}
  .nav{padding:0 18px;gap:14px}
  .brand-text small{display:none}
  .hero{padding:40px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:36px;text-align:center;padding:0 20px}
  .hero-actions{justify-content:center}
  .hero-meta{grid-template-columns:repeat(4,1fr);margin:0 auto;gap:10px}
  .meta-item b{font-size:20px}
  .section{padding:64px 0}
  .section-title{font-size:28px}
  .entrance-grid{grid-template-columns:1fr}
  .app-grid{grid-template-columns:1fr;gap:32px}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .updates-grid{grid-template-columns:repeat(2,1fr)}
  .reviews-grid{grid-template-columns:1fr;max-width:520px;margin:0 auto}
  .faq-list{grid-template-columns:1fr}
  .cta-box{padding:40px 28px}
  .cta-text h2{font-size:26px}
  .menu-btn{display:flex}
  .nav-list{display:none}
  .phone-mockup{width:260px}
  .phone-float{display:none}
  .foot-top{grid-template-columns:1fr 1fr;gap:24px}
  .platform-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .platform-card{padding:20px 18px}
  .tips-grid{grid-template-columns:repeat(2,1fr);gap:12px}
  .tip-card{padding:18px 14px}
  .platform-summary{padding:20px 22px}
}

/* ===== 响应式 · 中屏手机 381-480px ===== */
@media(min-width:381px) and (max-width:480px){
  :root{--topbar-h:34px;--nav-h:58px;--float-h:70px}
  .topbar{font-size:12px}
  .topbar-tag{font-size:10.5px;padding:2px 8px;flex-shrink:0}
  .topbar-text{font-size:11.5px}
  .nav{padding:0 14px;gap:10px}
  .brand-text small{display:none}
  .brand-text strong{font-size:16px}
  .brand-mark{width:32px;height:32px;font-size:18px}
  .btn-download{padding:8px 14px;font-size:13px}
  .hero{padding:32px 0 48px}
  .hero-grid{padding:0 16px;gap:28px;text-align:center}
  .title-main{font-size:36px;letter-spacing:1px}
  .title-sub{font-size:17px}
  .hero-desc{font-size:14px;line-height:1.85}
  .hero-actions{flex-direction:column;width:100%}
  .btn-primary,.btn-ghost{width:100%;justify-content:center}
  .hero-meta{grid-template-columns:repeat(2,1fr);gap:10px}
  .meta-item b{font-size:20px}
  .section{padding:56px 0}
  .section-title{font-size:24px}
  .section-desc{font-size:14px}
  .container{padding:0 16px}
  .entrance-grid{grid-template-columns:1fr;gap:12px}
  .entrance-card{padding:22px 18px}
  .app-grid{grid-template-columns:1fr;gap:32px}
  .feature-grid{grid-template-columns:1fr;gap:12px}
  .feature-card{padding:22px 18px}
  .cat-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .cat-card{padding:18px 12px}
  .updates-grid{grid-template-columns:1fr;gap:10px}
  .update-card{padding:18px 16px}
  .reviews-grid{grid-template-columns:1fr;gap:14px}
  .review-card{padding:22px 18px}
  .faq-list{grid-template-columns:1fr;gap:10px}
  .faq-q{padding:14px 44px 14px 16px;font-size:14px}
  .faq-q::after{right:14px;font-size:18px}
  .faq-a{padding:0 16px 14px}
  .faq-a p{font-size:13px}
  .cta-box{padding:36px 22px;text-align:center}
  .cta-text h2{font-size:22px}
  .cta-box::before{font-size:180px}
  .phone-mockup{width:240px}
  .phone-float{display:none}
  .timeline{padding-left:36px}
  .tl-body{padding:18px 16px}
  .tl-num{width:32px;height:32px;left:-36px;font-size:12px}
  .tags-box{padding:24px 16px;gap:8px}
  .tag-xl{padding:8px 14px;font-size:13px;min-height:38px}
  .tag-lg{padding:6px 12px;font-size:12px;min-height:32px}
  .tag{padding:5px 10px;font-size:12px;min-height:30px}
  .foot-top{grid-template-columns:1fr;gap:24px}
  .foot-bottom{flex-direction:column;text-align:center;gap:6px}
  .platform-grid{grid-template-columns:1fr;gap:10px}
  .platform-card{padding:20px 16px}
  .platform-list{grid-template-columns:auto 1fr;gap:4px 10px}
  .platform-list dt{font-size:11px;padding:3px 0}
  .platform-list dd{font-size:12px;padding:3px 0}
  .platform-summary{padding:20px 18px}
  .platform-summary h3{font-size:16px}
  .platform-summary p{font-size:13px}
  .tips-grid{grid-template-columns:1fr;gap:10px}
  .tip-card{padding:18px 14px}
  .tip-num{font-size:26px}
  .tip-card h4{font-size:14px}
  .tip-card p{font-size:12.5px}
  .menu-btn{display:flex}
  .nav-list{display:none}
  .float-dl{padding:0 12px}
  .float-btn{padding:10px 18px;font-size:13px}
  .back-top{right:12px;bottom:calc(var(--float-h) + 12px);width:40px;height:40px;font-size:18px}
}

/* ===== 响应式 · 小屏手机 341-380px ===== */
@media(min-width:341px) and (max-width:380px){
  :root{--topbar-h:32px;--nav-h:54px;--float-h:64px}
  .topbar{font-size:11px;height:32px}
  .topbar-tag{font-size:9.5px;padding:2px 6px;flex-shrink:0}
  .topbar-text{font-size:10.5px}
  .nav{padding:0 12px;gap:8px}
  .brand-text small{display:none}
  .brand-text strong{font-size:15px}
  .brand-mark{width:30px;height:30px;font-size:16px}
  .btn-download{padding:6px 10px;font-size:12px;min-height:36px}
  .btn-download span{display:none}
  .menu-btn{width:38px;height:38px;font-size:18px}
  .hero{padding:28px 0 40px}
  .hero-grid{padding:0 14px;gap:24px;text-align:center}
  .title-main{font-size:30px;letter-spacing:0.5px}
  .title-sub{font-size:14px}
  .hero-badge{font-size:11px;padding:4px 10px}
  .hero-desc{font-size:13px;line-height:1.75}
  .hero-actions{flex-direction:column;width:100%;gap:10px}
  .btn-primary,.btn-ghost{width:100%;justify-content:center;padding:12px 18px;min-height:48px}
  .btn-text strong{font-size:14px}
  .btn-text small{font-size:11px}
  .hero-meta{grid-template-columns:repeat(2,1fr);gap:8px}
  .meta-item{padding:10px 8px}
  .meta-item b{font-size:18px}
  .meta-item span{font-size:11px}
  .section{padding:48px 0}
  .section-title{font-size:22px}
  .section-desc{font-size:13px}
  .container{padding:0 14px}
  .eyebrow{font-size:11px;padding:3px 10px;letter-spacing:2px}
  .entrance-grid{grid-template-columns:1fr;gap:10px}
  .entrance-card{padding:18px 14px;gap:12px}
  .entrance-num{width:40px;height:40px;font-size:14px}
  .entrance-body h3{font-size:15px}
  .entrance-body p{font-size:12.5px}
  .app-grid{grid-template-columns:1fr;gap:28px}
  .phone-mini{width:200px}
  .mini-screen{min-height:320px}
  .info-row{gap:12px}
  .info-icon{width:42px;height:42px;font-size:20px}
  .info-row h4{font-size:15px}
  .info-row p{font-size:12.5px}
  .btn-primary.big{padding:14px 18px;min-height:54px}
  .download-badges{gap:6px}
  .badge-os{font-size:11px;padding:3px 8px}
  .feature-grid{grid-template-columns:1fr;gap:10px}
  .feature-card{padding:20px 16px}
  .feature-num{font-size:30px;top:14px;right:16px}
  .feature-card h3{font-size:16px}
  .feature-card p{font-size:12.5px;line-height:1.7}
  .feature-tags span{font-size:11px;padding:2px 8px}
  .cat-grid{grid-template-columns:repeat(2,1fr);gap:8px}
  .cat-card{padding:14px 8px}
  .cat-emoji{font-size:28px;height:40px}
  .cat-card h3{font-size:13px}
  .cat-card p{font-size:11px}
  .cat-count{font-size:10px;padding:2px 6px}
  .updates-grid{grid-template-columns:1fr;gap:8px}
  .update-card{padding:16px 14px}
  .update-card h4{font-size:14px}
  .update-card p{font-size:12px}
  .reviews-grid{grid-template-columns:1fr;gap:10px}
  .review-card{padding:18px 14px}
  .review-stars{font-size:16px}
  .review-text{font-size:13.5px}
  .faq-list{grid-template-columns:1fr;gap:8px}
  .faq-q{padding:12px 40px 12px 14px;font-size:13px;min-height:48px}
  .faq-q::after{right:12px;font-size:16px;width:20px;height:20px}
  .faq-a{padding:0 14px 12px}
  .faq-a p{font-size:12.5px}
  .cta-box{padding:32px 18px;text-align:center}
  .cta-text h2{font-size:20px}
  .cta-text p{font-size:13px}
  .cta-box::before{font-size:160px;right:0}
  .phone-mockup{width:220px}
  .phone-float{display:none}
  .timeline{padding-left:32px}
  .tl-body{padding:16px 14px}
  .tl-num{width:30px;height:30px;left:-32px;font-size:12px}
  .tl-body h3{font-size:15px}
  .tl-body p{font-size:12.5px}
  .tags-box{padding:20px 12px;gap:6px}
  .tag-xl{padding:7px 12px;font-size:12px;min-height:34px;border-radius:16px}
  .tag-lg{padding:5px 10px;font-size:11px;min-height:30px}
  .tag{padding:4px 8px;font-size:11px;min-height:26px}
  .tag-sm{padding:3px 7px;font-size:10px;min-height:24px}
  .foot-top{grid-template-columns:1fr;gap:20px;padding-bottom:20px}
  .foot-bottom{flex-direction:column;text-align:center;gap:4px;font-size:11px}
  .float-dl{padding:0 10px;height:64px}
  .float-logo{width:38px;height:38px;font-size:18px}
  .float-name{font-size:13px}
  .float-sub{font-size:10px}
  .float-btn{padding:8px 14px;font-size:12px;min-height:36px}
  .back-top{right:10px;bottom:calc(var(--float-h) + 10px);width:36px;height:36px;font-size:16px}
  .platform-grid{grid-template-columns:1fr;gap:8px}
  .platform-card{padding:18px 14px;border-radius:10px}
  .platform-head{gap:10px;margin-bottom:12px;padding-bottom:10px}
  .platform-logo{width:40px;height:40px;font-size:18px;border-radius:10px}
  .platform-head h3{font-size:15px}
  .platform-head small{font-size:10.5px}
  .platform-badge{font-size:9px;padding:2px 7px;top:10px;right:10px}
  .platform-list{grid-template-columns:auto 1fr;gap:3px 8px}
  .platform-list dt{font-size:10px;padding:2px 0}
  .platform-list dd{font-size:11.5px;padding:2px 0}
  .platform-summary{padding:18px 14px;border-radius:10px}
  .platform-summary h3{font-size:15px}
  .platform-summary p{font-size:12px;line-height:1.7}
  .tips-grid{grid-template-columns:1fr;gap:8px}
  .tip-card{padding:16px 12px;border-radius:10px}
  .tip-num{font-size:24px}
  .tip-card h4{font-size:13.5px}
  .tip-card p{font-size:12px;line-height:1.65}
  .tip-card code{font-size:11px}
}

/* ===== 响应式 · 超小屏 ≤340px ===== */
@media(max-width:340px){
  :root{--topbar-h:30px;--nav-h:50px;--float-h:60px}
  .topbar{font-size:10px;height:30px}
  .topbar-tag{font-size:9px;padding:2px 5px;flex-shrink:0}
  .topbar-text{font-size:9.5px}
  .nav{padding:0 10px;gap:6px}
  .brand-text small{display:none}
  .brand-text strong{font-size:13px;letter-spacing:0}
  .brand-mark{width:28px;height:28px;font-size:14px;border-radius:8px}
  .btn-download{padding:5px 8px;font-size:11px;min-height:32px}
  .btn-download span{display:none}
  .btn-download svg{width:14px;height:14px}
  .menu-btn{width:34px;height:34px;font-size:16px;border-radius:6px}
  .hero{padding:24px 0 36px}
  .hero-grid{padding:0 12px;gap:20px;text-align:center}
  .title-main{font-size:26px;letter-spacing:0.5px;line-height:1.2}
  .title-sub{font-size:13px}
  .hero-badge{font-size:10px;padding:3px 8px;letter-spacing:0.5px}
  .hero-desc{font-size:12px;line-height:1.7}
  .hero-actions{flex-direction:column;width:100%;gap:8px}
  .btn-primary,.btn-ghost{width:100%;justify-content:center;padding:10px 14px;min-height:42px;gap:8px}
  .btn-icon{width:26px;height:26px;font-size:14px}
  .btn-text strong{font-size:12px}
  .btn-text small{font-size:10px}
  .hero-meta{grid-template-columns:repeat(2,1fr);gap:6px}
  .meta-item{padding:8px 6px}
  .meta-item b{font-size:15px}
  .meta-item span{font-size:10px}
  .section{padding:40px 0}
  .section-title{font-size:20px}
  .section-desc{font-size:12px}
  .container{padding:0 12px}
  .section-head{margin-bottom:28px}
  .eyebrow{font-size:10px;padding:2px 8px;letter-spacing:1px}
  .entrance-grid{grid-template-columns:1fr;gap:8px}
  .entrance-card{padding:16px 12px;gap:10px;border-radius:10px}
  .entrance-num{width:36px;height:36px;font-size:13px;border-radius:10px}
  .entrance-body h3{font-size:14px}
  .entrance-body p{font-size:11.5px;line-height:1.6}
  .entrance-link{font-size:11px}
  .entrance-badge{font-size:9px;padding:2px 6px;top:10px;right:10px}
  .app-grid{grid-template-columns:1fr;gap:24px}
  .phone-mini{width:180px;padding:4px}
  .mini-screen{min-height:280px;border-radius:18px}
  .mini-banner{font-size:11px;padding:6px 10px}
  .mini-content{padding:10px}
  .mini-content h4{font-size:13px}
  .mini-content p{font-size:11px;line-height:1.7;text-indent:1.5em}
  .mini-toolbar span{font-size:14px;width:30px;height:30px}
  .info-row{gap:10px}
  .info-icon{width:36px;height:36px;font-size:16px;border-radius:10px}
  .info-row h4{font-size:13px}
  .info-row p{font-size:11.5px;line-height:1.6}
  .btn-primary.big{padding:12px 14px;min-height:48px;gap:10px}
  .btn-primary.big .btn-icon{width:30px;height:30px;font-size:16px}
  .download-badges{gap:4px}
  .badge-os{font-size:10px;padding:2px 6px}
  .feature-grid{grid-template-columns:1fr;gap:8px}
  .feature-card{padding:16px 12px;border-radius:10px}
  .feature-num{font-size:26px;top:10px;right:12px}
  .feature-card h3{font-size:14px}
  .feature-card p{font-size:11.5px;line-height:1.65}
  .feature-tags{gap:4px;margin-top:10px}
  .feature-tags span{font-size:10px;padding:2px 6px}
  .cat-grid{grid-template-columns:repeat(2,1fr);gap:6px}
  .cat-card{padding:12px 6px;border-radius:10px}
  .cat-emoji{font-size:24px;height:34px}
  .cat-card h3{font-size:12px}
  .cat-card p{font-size:10px;display:none}
  .cat-count{font-size:9px;padding:2px 5px}
  .updates-grid{grid-template-columns:1fr;gap:6px}
  .update-card{padding:14px 12px;border-radius:10px}
  .update-tag{font-size:10px;padding:2px 6px}
  .update-card h4{font-size:13px}
  .update-card p{font-size:11px;line-height:1.6}
  .reviews-grid{grid-template-columns:1fr;gap:8px}
  .review-card{padding:16px 12px;border-radius:10px}
  .review-stars{font-size:14px;margin-bottom:10px}
  .review-text{font-size:12.5px;line-height:1.75;margin-bottom:14px}
  .user-avatar{width:36px;height:36px;font-size:14px}
  .review-user strong{font-size:12px}
  .review-user small{font-size:10px}
  .faq-list{grid-template-columns:1fr;gap:6px}
  .faq-item{border-radius:10px}
  .faq-q{padding:10px 36px 10px 12px;font-size:12px;min-height:42px}
  .faq-q::after{right:10px;font-size:14px}
  .faq-a{padding:0 12px 10px}
  .faq-a p{font-size:11.5px;line-height:1.7}
  .cta-box{padding:28px 16px;text-align:center;border-radius:18px}
  .cta-text h2{font-size:18px}
  .cta-text p{font-size:12px}
  .cta-box::before{font-size:140px;right:-10px}
  .phone-mockup{width:200px;padding:6px;border-radius:30px}
  .phone-notch{width:70px;height:16px}
  .phone-screen{min-height:380px;border-radius:26px}
  .screen-header{padding:10px 12px;gap:6px}
  .screen-logo{width:24px;height:24px;font-size:13px}
  .screen-title{font-size:12px}
  .screen-menu{font-size:15px}
  .screen-search{padding:8px 10px;margin:10px;font-size:11px}
  .screen-tags{padding:0 10px;margin-bottom:10px;gap:4px}
  .screen-tags span{font-size:10px;padding:2px 6px}
  .screen-list{padding:0 10px}
  .list-item{padding:8px 0;gap:8px}
  .list-cover{width:34px;height:48px}
  .list-meta strong{font-size:11px}
  .list-meta small{font-size:10px}
  .list-meta em{font-size:9px}
  .screen-tabbar{padding:6px 0;margin-top:10px}
  .screen-tabbar .tab{font-size:10px;padding:4px 0}
  .phone-float{display:none}
  .timeline{padding-left:28px}
  .tl-body{padding:14px 12px;border-radius:10px}
  .tl-num{width:28px;height:28px;left:-28px;font-size:11px;border-width:1.5px}
  .tl-body h3{font-size:13px}
  .tl-body p{font-size:11.5px;line-height:1.7}
  .tl-tag{font-size:10px;padding:2px 6px;margin-top:8px}
  .tags-box{padding:16px 10px;gap:5px;border-radius:10px}
  .tag-xl{padding:6px 10px;font-size:11px;min-height:30px;border-radius:14px}
  .tag-lg{padding:4px 8px;font-size:10px;min-height:26px}
  .tag{padding:3px 6px;font-size:10px;min-height:24px}
  .tag-sm{padding:3px 6px;font-size:9px;min-height:22px}
  .footer-inner{padding:36px 14px 16px}
  .foot-top{grid-template-columns:1fr;gap:18px;padding-bottom:18px}
  .foot-logo{width:40px;height:40px;font-size:22px}
  .foot-desc{font-size:12px;line-height:1.7}
  .foot-tip{font-size:11px}
  .foot-col h5{font-size:13px;margin-bottom:10px}
  .foot-col li,.foot-col a{font-size:12px;margin-bottom:6px;min-height:28px}
  .kw-list a{font-size:10px;padding:3px 6px;min-height:24px}
  .foot-bottom{flex-direction:column;text-align:center;gap:4px;font-size:10px}
  .float-dl{padding:0 8px;height:60px}
  .float-dl-inner{padding:0 4px;gap:8px}
  .float-logo{width:34px;height:34px;font-size:16px;border-radius:8px}
  .float-info{min-width:0}
  .float-name{font-size:12px}
  .float-sub{font-size:9px}
  .float-btn{padding:7px 12px;font-size:11px;min-height:32px;border-radius:8px}
  .back-top{right:8px;bottom:calc(var(--float-h) + 8px);width:32px;height:32px;font-size:14px}
  .platform-grid{grid-template-columns:1fr;gap:6px}
  .platform-card{padding:16px 12px;border-radius:10px}
  .platform-head{gap:8px;margin-bottom:10px;padding-bottom:8px}
  .platform-logo{width:36px;height:36px;font-size:16px;border-radius:8px}
  .platform-head h3{font-size:14px}
  .platform-head small{font-size:10px}
  .platform-badge{font-size:9px;padding:2px 6px;top:8px;right:8px}
  .platform-list{grid-template-columns:auto 1fr;gap:2px 6px}
  .platform-list dt{font-size:9.5px;padding:2px 0}
  .platform-list dd{font-size:11px;padding:2px 0}
  .platform-summary{padding:16px 12px;border-radius:10px}
  .platform-summary h3{font-size:14px}
  .platform-summary p{font-size:11.5px;line-height:1.65}
  .tips-grid{grid-template-columns:1fr;gap:6px}
  .tip-card{padding:14px 10px;border-radius:10px}
  .tip-num{font-size:22px}
  .tip-card h4{font-size:13px}
  .tip-card p{font-size:11.5px;line-height:1.6}
  .tip-card code{font-size:10px}
}

/* ===== 安全区 / 触控优化 ===== */
.float-dl,.btn-primary,.btn-ghost,.btn-download,.float-btn,
.menu-btn,.back-top,.faq-q,.tag,.drawer a,.entrance-card,.review-card,
.feature-card,.tl-body,.info-row,.cat-card,
.update-card,.tags-box,.topbar-tag,
.platform-card,.platform-logo,.tip-card,.tip-card code,.platform-summary{
  -webkit-tap-highlight-color:transparent;
  touch-action:manipulation;
}

/* ===== 防溢出 ===== */
.hero-grid,.entrance-grid,.app-grid,.feature-grid,.cat-grid,
.updates-grid,.reviews-grid,.faq-list,.cta-box,
.footer-inner,.float-dl-inner,.tags-box,.timeline,.phone-mockup,
.topbar-inner,.platform-grid,.platform-card,.platform-summary,
.tips-grid,.tip-card{
  overflow-x:hidden;
}