/* ==========================================================================
   画质助手 · huazhizhushou.net  ·  全站共用样式表
   浅蓝科技风（中等亮度）：浅蓝灰底 + 深蓝文字 + 蓝色主调 + 橙/紫点缀
   ========================================================================== */

:root{
  --bg:#F2F7FE;
  --bg-2:#E8F1FD;
  --panel:#FFFFFF;
  --panel-2:#F5F9FF;
  --panel-3:#EAF2FE;
  --line:#D5E3F6;
  --line-soft:rgba(31,111,235,.13);
  --text:#0D2440;
  --text-2:#32506F;
  --muted:#6B85A6;
  --blue:#1F6FEB;
  --blue-deep:#0B4FC4;
  --sky:#0EA5E9;
  --purple:#6D4AFF;
  --orange:#F97316;
  --green:#10B981;
  --radius:18px;
  --radius-lg:26px;
  --shadow:0 20px 46px -30px rgba(16,58,120,.42);
  --shadow-glow:0 0 0 1px rgba(31,111,235,.22), 0 26px 54px -30px rgba(31,111,235,.45);
  --maxw:1180px;
  --ease:cubic-bezier(.22,.7,.28,1);
}

*,*::before,*::after{box-sizing:border-box;}

html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",
              "Noto Sans CJK SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,
              "Helvetica Neue",Arial,"Heiti SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

/* 背景光晕 — 固定层，营造清爽的科技感 */
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-2;
  background:
    radial-gradient(780px 520px at 88% -8%, rgba(109,74,255,.13), transparent 62%),
    radial-gradient(700px 500px at 2% 10%, rgba(14,165,233,.16), transparent 60%),
    radial-gradient(760px 620px at 62% 106%, rgba(249,115,22,.10), transparent 62%),
    linear-gradient(180deg,#F6FAFF 0%,#E9F1FD 48%,#F5F9FF 100%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  opacity:.55;
  background-image:
    linear-gradient(rgba(31,111,235,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(31,111,235,.055) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(1200px 820px at 50% 0,#000 26%,transparent 80%);
  -webkit-mask-image:radial-gradient(1200px 820px at 50% 0,#000 26%,transparent 80%);
}

img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}

::selection{background:rgba(31,111,235,.22);color:var(--text);}

.wrap{width:min(100% - 40px,var(--maxw));margin-inline:auto;}

/* ---------------- 通用排版 ---------------- */
h1,h2,h3,h4{line-height:1.28;margin:0 0 .5em;font-weight:800;letter-spacing:0;color:var(--text);}
h1{font-size:clamp(28px,4.6vw,44px);}
h2{font-size:clamp(23px,3.3vw,34px);}
h3{font-size:clamp(18px,2.2vw,22px);}
p{margin:0 0 1em;color:var(--text-2);}
strong{color:var(--text);font-weight:700;}

.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:13px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;
  color:var(--blue-deep);
  padding:7px 15px;border-radius:999px;
  background:rgba(31,111,235,.09);
  border:1px solid rgba(31,111,235,.26);
  margin-bottom:18px;
}
.eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--blue);box-shadow:0 0 10px rgba(31,111,235,.7);}

.grad-cyan{background:linear-gradient(96deg,#1F6FEB,#6D4AFF 58%,#0EA5E9);-webkit-background-clip:text;background-clip:text;color:transparent;}
.accent{color:var(--blue);font-weight:600;}
.accent-o{color:var(--orange);}

.lead{font-size:clamp(15px,1.5vw,17.5px);color:var(--text-2);}

.section{padding:clamp(52px,7vw,92px) 0;position:relative;}
.section-head{max-width:800px;margin-bottom:clamp(28px,4vw,48px);}
.section-head.center{margin-inline:auto;text-align:center;}
.section-head p{margin-bottom:0;}

/* ---------------- 按钮 ---------------- */
.btn{
  --btn-bg:linear-gradient(96deg,#2E86FF,#0EA5E9);
  --btn-fg:#FFFFFF;
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:15px 30px;border-radius:999px;border:0;cursor:pointer;
  font-size:16px;font-weight:800;font-family:inherit;letter-spacing:.02em;
  color:var(--btn-fg);background:var(--btn-bg);
  box-shadow:0 14px 30px -14px rgba(31,111,235,.65);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),filter .25s var(--ease);
  white-space:nowrap;
}
.btn:hover{transform:translateY(-3px);box-shadow:0 22px 42px -16px rgba(31,111,235,.78);filter:brightness(1.05);}
.btn:active{transform:translateY(-1px);}
.btn-hot{--btn-bg:linear-gradient(96deg,#FB923C,#F97316);box-shadow:0 14px 30px -14px rgba(249,115,22,.7);}
.btn-hot:hover{box-shadow:0 22px 44px -16px rgba(249,115,22,.85);}
.btn-ghost{
  background:#FFFFFF;color:var(--blue-deep);
  border:1px solid var(--line);box-shadow:0 10px 24px -20px rgba(16,58,120,.5);
}
.btn-ghost:hover{background:#FFFFFF;border-color:rgba(31,111,235,.55);box-shadow:0 16px 34px -20px rgba(31,111,235,.6);}
.btn-lg{padding:18px 40px;font-size:17.5px;}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}

/* ---------------- 顶部导航 ---------------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.80);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line-soft);
  box-shadow:0 8px 26px -26px rgba(16,58,120,.55);
}
.nav{display:flex;align-items:center;gap:22px;height:72px;}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand img{width:42px;height:42px;border-radius:12px;box-shadow:0 8px 18px -9px rgba(31,111,235,.75);}
.brand-name{font-size:20px;font-weight:800;letter-spacing:.02em;color:var(--text);}
.brand-name small{display:block;font-size:10.5px;font-weight:600;letter-spacing:.2em;color:var(--muted);text-transform:uppercase;}

.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-links a{
  padding:9px 15px;border-radius:10px;font-size:15px;font-weight:600;color:var(--text-2);
  transition:color .2s,background .2s;
}
.nav-links a:hover{color:var(--blue-deep);background:rgba(31,111,235,.08);}
.nav-links a.active{color:var(--blue-deep);background:rgba(31,111,235,.12);}
.nav .btn{padding:10px 22px;font-size:14.5px;margin-left:8px;}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border-radius:12px;
  background:rgba(31,111,235,.08);border:1px solid var(--line);cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:19px;height:2px;background:var(--text);border-radius:2px;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:19px;height:2px;background:var(--text);border-radius:2px;}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* ---------------- Hero ---------------- */
.hero{padding:clamp(46px,7vw,88px) 0 clamp(40px,6vw,72px);position:relative;}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:clamp(28px,4vw,58px);align-items:center;}
.hero h1{margin-bottom:18px;}
.hero .lead{max-width:560px;}
.hero .btn-row{margin-top:26px;}

.badges{display:flex;flex-wrap:wrap;gap:9px;margin-top:22px;}
.badge{
  display:inline-flex;align-items:center;gap:7px;
  font-size:13px;font-weight:600;color:var(--text-2);
  padding:7px 13px;border-radius:999px;
  background:#FFFFFF;border:1px solid var(--line);
  box-shadow:0 8px 20px -20px rgba(16,58,120,.55);
}
.badge b{color:var(--blue-deep);}
.badge .dot{width:6px;height:6px;border-radius:50%;background:var(--green);box-shadow:0 0 9px rgba(16,185,129,.85);}

/* Hero 右侧手机预览 */
.hero-visual{position:relative;display:flex;justify-content:center;padding:0 26px;}
.phone{
  position:relative;width:min(300px,74vw);border-radius:34px;
  background:linear-gradient(160deg,#FFFFFF,#E7F0FD);
  border:1px solid #C9DAF2;
  padding:9px;
  box-shadow:0 30px 60px -34px rgba(16,58,120,.55),0 0 0 1px rgba(31,111,235,.12),0 34px 80px -44px rgba(31,111,235,.5);
}
.phone img{border-radius:26px;width:100%;}
.phone::after{
  content:"";position:absolute;inset:-1px;border-radius:36px;pointer-events:none;
  background:linear-gradient(150deg,rgba(31,111,235,.45),transparent 42%,rgba(249,115,22,.32));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;padding:1px;
}
.phone-float{
  position:absolute;padding:12px 16px;border-radius:16px;
  background:rgba(255,255,255,.96);border:1px solid var(--line);
  backdrop-filter:blur(8px);box-shadow:0 18px 34px -22px rgba(16,58,120,.55);
  font-size:13px;font-weight:700;color:var(--text);
}
.phone-float small{display:block;font-size:11px;font-weight:600;color:var(--muted);letter-spacing:.06em;}
.phone-float .n{font-size:22px;font-weight:800;color:var(--blue);}
.pf-1{top:7%;left:-14px;}
.pf-2{bottom:9%;right:-10px;animation-delay:1.6s;}
.pf-3{bottom:46%;left:-18px;animation-delay:.8s;}
.pf-3 .n{color:var(--orange);}
.pf-2 .n{color:var(--green);}
.float{animation:floaty 5.6s ease-in-out infinite;}
@keyframes floaty{0%,100%{transform:translateY(0);}50%{transform:translateY(-13px);}}

/* ---------------- 统计条 ---------------- */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:var(--line);border:1px solid var(--line);
  border-radius:var(--radius-lg);overflow:hidden;margin-top:clamp(34px,5vw,58px);
  box-shadow:var(--shadow);
}
.stat{background:#FFFFFF;padding:24px 20px;text-align:center;}
.stat .n{font-size:clamp(24px,3vw,32px);font-weight:800;color:var(--text);letter-spacing:.01em;}
.stat .n em{font-style:normal;color:var(--blue);}
.stat .l{font-size:13.5px;color:var(--muted);margin-top:4px;}

/* ---------------- 卡片网格 ---------------- */
.grid{display:grid;gap:20px;}
.g-2{grid-template-columns:repeat(2,1fr);}
.g-3{grid-template-columns:repeat(3,1fr);}
.g-4{grid-template-columns:repeat(4,1fr);}

.card{
  position:relative;background:#FFFFFF;
  border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:28px 26px;transition:transform .3s var(--ease),border-color .3s,box-shadow .3s;
  overflow:hidden;box-shadow:0 14px 34px -28px rgba(16,58,120,.55);
}
.card::before{
  content:"";position:absolute;inset:0;opacity:0;transition:opacity .35s;
  background:radial-gradient(400px 220px at var(--mx,50%) var(--my,0%),rgba(31,111,235,.10),transparent 68%);
}
.card:hover{transform:translateY(-6px);border-color:rgba(31,111,235,.45);box-shadow:var(--shadow-glow);}
.card:hover::before{opacity:1;}
.card>*{position:relative;}
.card h3{margin-bottom:9px;}
.card p{font-size:14.6px;margin-bottom:0;}
.card .ico{
  width:52px;height:52px;border-radius:15px;display:flex;align-items:center;justify-content:center;
  margin-bottom:16px;background:rgba(31,111,235,.10);border:1px solid rgba(31,111,235,.26);
}
.card .ico svg{width:26px;height:26px;stroke:var(--blue);}
.card.v-purple .ico{background:rgba(109,74,255,.10);border-color:rgba(109,74,255,.28);}
.card.v-purple .ico svg{stroke:var(--purple);}
.card.v-orange .ico{background:rgba(249,115,22,.10);border-color:rgba(249,115,22,.30);}
.card.v-orange .ico svg{stroke:var(--orange);}
.card.v-green .ico{background:rgba(16,185,129,.10);border-color:rgba(16,185,129,.30);}
.card.v-green .ico svg{stroke:var(--green);}

.tagline{font-size:12.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:10px;}

/* ---------------- 手机截图横滑 ---------------- */
.shots{
  display:flex;gap:22px;overflow-x:auto;padding:8px 4px 22px;
  scroll-snap-type:x mandatory;scrollbar-width:thin;
}
.shots::-webkit-scrollbar{height:8px;}
.shots::-webkit-scrollbar-thumb{background:rgba(31,111,235,.32);border-radius:99px;}
.shots::-webkit-scrollbar-track{background:rgba(31,111,235,.10);border-radius:99px;}
.shot{
  flex:0 0 auto;width:236px;scroll-snap-align:center;text-align:center;
}
.shot .frame{
  border-radius:30px;padding:8px;border:1px solid #C9DAF2;
  background:linear-gradient(160deg,#FFFFFF,#E7F0FD);
  box-shadow:0 22px 44px -30px rgba(16,58,120,.6);
  transition:transform .35s var(--ease),box-shadow .35s;
}
.shot:hover .frame{transform:translateY(-8px) scale(1.02);box-shadow:0 26px 50px -30px rgba(31,111,235,.6),0 0 0 1px rgba(31,111,235,.25);}
.shot .frame img{border-radius:23px;}
.shot figcaption{margin-top:14px;font-size:14.5px;font-weight:700;color:var(--text);}
.shot figcaption span{display:block;font-size:12.8px;font-weight:500;color:var(--muted);margin-top:3px;}

/* ---------------- 步骤 ---------------- */
.steps{counter-reset:st;display:grid;gap:18px;}
.step{
  position:relative;display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:start;
  background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px 26px;
  transition:border-color .3s,transform .3s var(--ease),box-shadow .3s;
  box-shadow:0 14px 34px -30px rgba(16,58,120,.55);
}
.step:hover{border-color:rgba(31,111,235,.42);transform:translateX(5px);box-shadow:0 18px 40px -30px rgba(31,111,235,.5);}
.step-n{
  width:52px;height:52px;border-radius:15px;display:flex;align-items:center;justify-content:center;
  font-size:21px;font-weight:800;color:#FFFFFF;
  background:linear-gradient(140deg,#2E86FF,#6D4AFF);
  box-shadow:0 12px 24px -14px rgba(31,111,235,.8);flex-shrink:0;
}
.step h3{margin-bottom:6px;font-size:18.5px;}
.step p{margin-bottom:0;font-size:14.8px;}

/* ---------------- FAQ 手风琴 ---------------- */
.faq{display:grid;gap:13px;}
.faq-item{
  background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  transition:border-color .3s,box-shadow .3s;
  box-shadow:0 12px 30px -30px rgba(16,58,120,.55);
}
.faq-item.open{border-color:rgba(31,111,235,.45);box-shadow:0 16px 40px -32px rgba(31,111,235,.55),0 0 0 1px rgba(31,111,235,.12);}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;text-align:left;
  background:none;border:0;cursor:pointer;font-family:inherit;
  padding:20px 24px;color:var(--text);font-size:16.5px;font-weight:700;
}
.faq-q .q-mark{
  width:26px;height:26px;border-radius:8px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:rgba(31,111,235,.10);color:var(--blue-deep);font-size:13px;font-weight:800;
}
.faq-q .chev{margin-left:auto;width:20px;height:20px;flex-shrink:0;transition:transform .3s var(--ease);stroke:var(--muted);}
.faq-item.open .chev{transform:rotate(180deg);stroke:var(--blue);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .42s var(--ease);}
.faq-a-inner{padding:0 24px 22px 66px;font-size:15px;color:var(--text-2);}
.faq-a-inner p:last-child{margin-bottom:0;}

/* ---------------- 评价 ---------------- */
.review{
  background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px;
  display:flex;flex-direction:column;gap:16px;height:100%;
  box-shadow:0 14px 34px -28px rgba(16,58,120,.55);
}
.stars{display:flex;gap:3px;}
.stars svg{width:17px;height:17px;fill:#FBBF24;}
.review p{font-size:15px;margin:0;color:var(--text-2);flex:1;}
.who{display:flex;align-items:center;gap:12px;padding-top:16px;border-top:1px solid var(--line-soft);}
.who .av{
  width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:16px;color:#FFFFFF;background:linear-gradient(140deg,#2E86FF,#6D4AFF);
}
.who b{display:block;font-size:14.5px;color:var(--text);}
.who small{font-size:12.5px;color:var(--muted);}

/* ---------------- 表格 ---------------- */
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-lg);background:#FFFFFF;box-shadow:0 14px 34px -30px rgba(16,58,120,.5);}
table{width:100%;border-collapse:collapse;min-width:560px;font-size:14.6px;}
th,td{padding:15px 20px;text-align:left;border-bottom:1px solid var(--line-soft);}
thead th{background:rgba(31,111,235,.07);color:var(--text);font-weight:700;font-size:14px;letter-spacing:.03em;}
tbody tr:last-child td{border-bottom:0;}
tbody tr:hover{background:rgba(31,111,235,.04);}
td strong{color:var(--blue);}

/* ---------------- 提示块 ---------------- */
.note{
  display:flex;gap:15px;align-items:flex-start;
  background:rgba(249,115,22,.08);border:1px solid rgba(249,115,22,.28);
  border-radius:var(--radius);padding:18px 22px;margin:22px 0;
}
.note svg{width:22px;height:22px;flex-shrink:0;stroke:var(--orange);margin-top:2px;}
.note p{margin:0;font-size:14.6px;color:#8A4413;}
.note.tip{background:rgba(16,185,129,.08);border-color:rgba(16,185,129,.28);}
.note.tip svg{stroke:var(--green);}
.note.tip p{color:#0B5F46;}

/* ---------------- CTA ---------------- */
.cta{
  position:relative;overflow:hidden;text-align:center;color:#FFFFFF;
  border-radius:32px;padding:clamp(38px,5.6vw,64px) 30px;
  background:
    radial-gradient(700px 340px at 50% -20%,rgba(255,255,255,.30),transparent 68%),
    linear-gradient(150deg,#2E86FF,#4F63FF 52%,#6D4AFF);
  border:1px solid rgba(31,111,235,.35);
  box-shadow:0 30px 62px -34px rgba(31,111,235,.7);
}
.cta h2{color:#FFFFFF;margin-bottom:14px;}
.cta p{max-width:640px;margin-inline:auto;color:rgba(255,255,255,.90);}
.cta .btn-row{justify-content:center;margin-top:26px;}
.cta .btn-ghost{background:rgba(255,255,255,.16);color:#FFFFFF;border-color:rgba(255,255,255,.45);}
.cta .btn-ghost:hover{background:rgba(255,255,255,.26);}
.cta .btn-hot{--btn-bg:linear-gradient(96deg,#FFFFFF,#EAF3FF);color:#B4470B;box-shadow:0 14px 30px -14px rgba(11,30,70,.5);}
.cta-meta{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:22px;}
.cta-meta span{
  font-size:13px;color:#FFFFFF;padding:7px 14px;border-radius:999px;
  background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.34);
}

/* ---------------- 内页 Hero ---------------- */
.page-hero{padding:clamp(40px,6vw,70px) 0 clamp(24px,3.4vw,40px);border-bottom:1px solid var(--line-soft);}
.crumb{font-size:13.5px;color:var(--muted);margin-bottom:16px;}
.crumb a{color:var(--text-2);}
.crumb a:hover{color:var(--blue);}
.crumb span{color:var(--muted);margin:0 7px;}
.page-hero h1{max-width:880px;margin-bottom:16px;}
.page-hero .lead{max-width:820px;}

/* ---------------- 文章正文 ---------------- */
.prose{max-width:830px;}
.prose h2{margin-top:44px;}
.prose h3{margin-top:30px;}
.prose ul.bullets,.prose ol.nums{margin:0 0 20px;}
.prose ul.bullets li{position:relative;padding-left:26px;margin-bottom:11px;color:var(--text-2);font-size:15.6px;}
.prose ul.bullets li::before{
  content:"";position:absolute;left:3px;top:11px;width:9px;height:9px;border-radius:3px;
  background:linear-gradient(140deg,#2E86FF,#6D4AFF);
}
.prose ol.nums{counter-reset:n;}
.prose ol.nums li{position:relative;padding-left:40px;margin-bottom:12px;color:var(--text-2);font-size:15.6px;}
.prose ol.nums li::before{
  counter-increment:n;content:counter(n);
  position:absolute;left:0;top:1px;width:26px;height:26px;border-radius:8px;
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;color:#FFFFFF;
  background:linear-gradient(140deg,#2E86FF,#6D4AFF);
}
.keybox{
  background:linear-gradient(170deg,#F5F9FF,#EAF2FE);
  border:1px solid var(--line);border-left:3px solid var(--blue);
  border-radius:14px;padding:20px 24px;margin:26px 0;
}
.keybox h4{margin:0 0 8px;color:var(--text);font-size:16px;}
.keybox p{margin:0;font-size:14.6px;}

.related{display:grid;gap:16px;grid-template-columns:repeat(3,1fr);}
.related a{
  display:block;background:#FFFFFF;
  border:1px solid var(--line);border-radius:var(--radius);padding:22px;
  transition:transform .3s var(--ease),border-color .3s,box-shadow .3s;
  box-shadow:0 14px 32px -30px rgba(16,58,120,.55);
}
.related a:hover{transform:translateY(-5px);border-color:rgba(31,111,235,.45);box-shadow:var(--shadow-glow);}
.related b{display:block;color:var(--text);font-size:16px;margin-bottom:7px;}
.related small{color:var(--muted);font-size:13.6px;line-height:1.6;display:block;}
.related .go{display:inline-flex;align-items:center;gap:6px;margin-top:12px;font-size:13.5px;font-weight:700;color:var(--blue);}

/* ---------------- 页脚 ---------------- */
.site-footer{
  border-top:1px solid var(--line-soft);
  background:rgba(255,255,255,.72);
  padding:clamp(40px,5vw,64px) 0 30px;margin-top:20px;
}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:34px;}
.foot-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px;}
.foot-brand img{width:38px;height:38px;border-radius:11px;}
.foot-brand b{font-size:18px;color:var(--text);}
.site-footer p{font-size:14px;color:var(--muted);}
.foot-col h4{font-size:15px;color:var(--text);margin-bottom:14px;}
.foot-col a{display:block;font-size:14px;color:var(--muted);padding:5px 0;transition:color .2s;}
.foot-col a:hover{color:var(--blue);}
.copy{
  margin-top:34px;padding-top:22px;border-top:1px solid var(--line-soft);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13.2px;color:var(--muted);
}
.disclaimer{
  margin-top:16px;font-size:12.8px;color:#5C7595;line-height:1.7;
  background:rgba(31,111,235,.05);border:1px solid var(--line-soft);
  border-radius:12px;padding:14px 18px;
}

/* ---------------- 移动端底部下载条 ---------------- */
.dock{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:90;
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  background:rgba(255,255,255,.96);backdrop-filter:blur(14px);
  border-top:1px solid var(--line-soft);gap:12px;align-items:center;
  box-shadow:0 -10px 30px -24px rgba(16,58,120,.6);
}
.dock .d-info{font-size:12.5px;color:var(--muted);line-height:1.45;flex:1;}
.dock .d-info b{display:block;color:var(--text);font-size:14.5px;}
.dock .btn{padding:13px 26px;font-size:15.5px;}

/* ---------------- 滚动进场动画 ---------------- */
[data-reveal]{opacity:1;transform:none;}
html.anim [data-reveal]{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease);}
html.anim [data-reveal].in{opacity:1;transform:none;}

/* ---------------- 回到顶部 ---------------- */
.totop{
  position:fixed;right:22px;bottom:26px;z-index:85;
  width:46px;height:46px;border-radius:14px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  background:#FFFFFF;border:1px solid var(--line);color:var(--blue);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .3s,visibility .3s,transform .3s;
  box-shadow:0 16px 34px -22px rgba(16,58,120,.6);
}
.totop.show{opacity:1;visibility:visible;transform:none;}
.totop:hover{border-color:rgba(31,111,235,.55);}

/* ---------------- 响应式 ---------------- */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero .lead{max-width:none;}
  .hero-visual{order:-1;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .g-4{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:820px){
  .nav-links{
    position:fixed;top:72px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:2px;
    background:rgba(255,255,255,.98);backdrop-filter:blur(16px);
    padding:12px 20px 22px;border-bottom:1px solid var(--line-soft);
    transform:translateY(-130%);transition:transform .34s var(--ease);
    box-shadow:var(--shadow);margin-left:0;
  }
  .nav-links.open{transform:translateY(0);}
  .nav-links a{padding:13px 14px;font-size:16px;}
  .nav .btn{display:none;}
  .nav-toggle{display:flex;}
  .g-3,.g-2{grid-template-columns:1fr;}
  .related{grid-template-columns:1fr;}
  .stats{grid-template-columns:repeat(2,1fr);}
  .dock{display:flex;}
  body{padding-bottom:76px;}
  .totop{bottom:92px;}
  .step{grid-template-columns:1fr;gap:14px;}
  .prose ol.nums li,.faq-a-inner{padding-left:22px;}
  .faq-a-inner{padding-left:24px;}
}
@media (max-width:520px){
  .g-4{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr;}
  .stats{grid-template-columns:1fr 1fr;}
  .shot{width:200px;}
  .hero-visual{padding:0 14px;}
  .pf-1{left:-6px;}
  .pf-3{left:-8px;}
  .pf-2{right:-4px;}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important;}
  [data-reveal],html.anim [data-reveal]{opacity:1!important;transform:none!important;}
}