/* =========================================================
   VideoFlow · 高级暗色主题
   参考 Linear / Vercel / Stripe 设计语言
   ========================================================= */

:root{
  /* 背景层次 */
  --bg-0:#08080c;
  --bg-1:#0b0b14;
  --bg-2:#111119;
  --surface:rgba(255,255,255,.025);
  --surface-hover:rgba(255,255,255,.045);
  --surface-solid:#12121a;

  /* 描边 */
  --border:rgba(255,255,255,.08);
  --border-strong:rgba(255,255,255,.12);
  --border-highlight:rgba(255,255,255,.16);

  /* 主色 - 亮紫渐变 */
  --accent:#7c5cff;
  --accent-2:#a78bfa;
  --accent-3:#c4b5fd;
  --accent-glow:rgba(124,92,255,.35);

  /* 文本 */
  --text:#ececf1;
  --text-2:#a1a1aa;
  --text-3:#71717a;
  --dim:var(--text-3);

  /* 功能色 */
  --ok:#22d3ee;
  --ok-2:#10b981;
  --warn:#f59e0b;
  --danger:#ef4444;

  --radius:14px;
  --radius-lg:20px;
}

/* ================= 全局重置 ================= */
*{box-sizing:border-box;margin:0;padding:0}

html{scroll-behavior:smooth}

body{
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI",
              "PingFang SC","Microsoft YaHei",sans-serif;
  font-feature-settings:"cv11","ss01","ss03";
  background:var(--bg-0);
  color:var(--text);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  letter-spacing:-0.011em;
  position:relative;
  overflow-x:hidden;
}

/* 背景光晕：顶部紫色柔光 + 网格纹理 */
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-2;
  background:
    radial-gradient(ellipse 1200px 600px at 50% -10%, rgba(124,92,255,.22), transparent 60%),
    radial-gradient(ellipse 800px 500px at 80% 20%, rgba(167,139,250,.10), transparent 60%),
    radial-gradient(ellipse 900px 600px at 20% 40%, rgba(34,211,238,.06), transparent 60%),
    linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 100%);
  pointer-events:none;
}

/* 细网格纹理 */
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  background-image:
    linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.018) 1px, transparent 1px);
  background-size:60px 60px;
  mask-image:radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 80%);
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 80%);
  pointer-events:none;
}

/* ================= 顶栏 ================= */
.navbar{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding: 14px max(24px, calc((100vw - 1200px) / 2));
  background:rgba(8,8,12,.72);
  backdrop-filter:blur(20px) saturate(180%);
  -webkit-backdrop-filter:blur(20px) saturate(180%);
  border-bottom:1px solid var(--border);
  position:sticky;
  top:0;
  z-index:100;
}
.navbar::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:1px;
  background:linear-gradient(90deg, transparent, rgba(124,92,255,.5), transparent);
}
.logo{
  font-size:19px;
  font-weight:700;
  letter-spacing:-0.02em;
  background:linear-gradient(135deg, #fff 0%, var(--accent-2) 100%);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
  text-decoration:none;
}
.nav-right{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.nav-right .link{
  color:var(--text-2);
  text-decoration:none;
  font-size:13.5px;
  font-weight:500;
  padding:8px 14px;
  border-radius:8px;
  transition:all .18s cubic-bezier(.4,0,.2,1);
}
.nav-right .link:hover{
  color:var(--text);
  background:var(--surface-hover);
}
.nav-right .credits{
  background:linear-gradient(135deg, rgba(124,92,255,.12), rgba(34,211,238,.08));
  border:1px solid rgba(124,92,255,.25);
  padding:6px 14px;
  border-radius:20px;
  font-size:13px;
  color:var(--text-2);
  font-weight:500;
  margin:0 6px;
}
.nav-right .credits b{
  color:var(--accent-3);
  font-weight:700;
  letter-spacing:0;
}

/* ================= 按钮 ================= */
.btn-primary{
  background:linear-gradient(180deg, var(--accent) 0%, #6a48f0 100%);
  color:#fff;
  border:none;
  padding:9px 20px;
  border-radius:10px;
  font-size:13.5px;
  font-weight:600;
  cursor:pointer;
  text-decoration:none;
  display:inline-block;
  font-family:inherit;
  letter-spacing:-0.005em;
  transition:all .18s cubic-bezier(.4,0,.2,1);
  box-shadow:
    0 1px 0 rgba(255,255,255,.15) inset,
    0 1px 2px rgba(0,0,0,.4),
    0 0 0 0 var(--accent-glow);
  position:relative;
  overflow:hidden;
}
.btn-primary::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg, rgba(255,255,255,.1), transparent 50%);
  pointer-events:none;
}
.btn-primary:hover{
  transform:translateY(-1px);
  box-shadow:
    0 1px 0 rgba(255,255,255,.2) inset,
    0 4px 12px rgba(124,92,255,.35),
    0 0 0 4px rgba(124,92,255,.12);
}
.btn-primary:active{transform:translateY(0)}
.btn-primary:disabled{
  background:#1a1a24;
  color:var(--text-3);
  cursor:not-allowed;
  box-shadow:none;
}
.btn-primary:disabled::after{display:none}
.btn-primary.full{
  display:block;
  width:100%;
  padding:15px;
  font-size:15px;
  margin-top:20px;
  border-radius:12px;
  font-weight:600;
}

.btn-secondary{
  color:var(--text);
  text-decoration:none;
  padding:8px 16px;
  border-radius:10px;
  border:1px solid var(--border-strong);
  background:var(--surface);
  backdrop-filter:blur(10px);
  font-size:13.5px;
  font-weight:500;
  cursor:pointer;
  font-family:inherit;
  display:inline-block;
  transition:all .18s cubic-bezier(.4,0,.2,1);
}
.btn-secondary:hover{
  background:var(--surface-hover);
  border-color:var(--border-highlight);
  transform:translateY(-1px);
}

/* ================= 主容器 ================= */
.container{
  max-width:960px;
  margin:0 auto;
  padding:40px 24px;
}

.page-title{
  font-size:30px;
  font-weight:700;
  letter-spacing:-0.025em;
  margin-bottom:10px;
  text-align:center;
  background:linear-gradient(180deg, #fff 0%, #b8b8c8 100%);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.page-sub{
  color:var(--text-2);
  text-align:center;
  font-size:14.5px;
  margin-bottom:32px;
  line-height:1.7;
}
.section-title{
  margin:36px 0 16px;
  font-size:18px;
  font-weight:700;
  letter-spacing:-0.015em;
}

/* ================= Hero ================= */
.hero{
  text-align:center;
  padding:56px 0 20px;
}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  background:rgba(124,92,255,.08);
  border:1px solid rgba(124,92,255,.2);
  color:var(--accent-3);
  padding:6px 14px;
  border-radius:20px;
  font-size:12.5px;
  font-weight:500;
  margin-bottom:24px;
  backdrop-filter:blur(10px);
}
.hero-title{
  font-size:52px;
  font-weight:800;
  letter-spacing:-0.035em;
  line-height:1.1;
  margin-bottom:20px;
  background:linear-gradient(180deg, #ffffff 0%, #d0d0dd 50%, #8b8ba0 100%);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
  position:relative;
}
.hero-title::after{
  content:attr(data-text);
  position:absolute;
  inset:0;
  background:linear-gradient(180deg, transparent 30%, rgba(124,92,255,.4) 100%);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
  pointer-events:none;
}
.hero-sub{
  color:var(--text-2);
  font-size:16px;
  line-height:1.8;
  margin-bottom:36px;
  letter-spacing:-0.005em;
}
.hero-sub .hl{
  color:var(--accent-3);
  font-weight:600;
  padding:0 2px;
}

/* ================= 上传区域 ================= */
.upload-section{max-width:720px;margin:0 auto}

.upload-tabs{
  display:flex;
  gap:6px;
  margin-bottom:16px;
  justify-content:center;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:12px;
  padding:4px;
  width:fit-content;
  margin-left:auto;
  margin-right:auto;
  backdrop-filter:blur(10px);
}
.upload-tab{
  background:transparent;
  color:var(--text-2);
  border:none;
  padding:9px 22px;
  border-radius:9px;
  cursor:pointer;
  font-size:13.5px;
  font-weight:500;
  font-family:inherit;
  transition:all .18s cubic-bezier(.4,0,.2,1);
}
.upload-tab.active{
  background:rgba(124,92,255,.15);
  color:var(--accent-3);
  font-weight:600;
  box-shadow:0 1px 0 rgba(255,255,255,.06) inset;
}
.upload-panel.hidden{display:none}

.upload-zone{
  background:linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.01));
  border:1.5px dashed rgba(124,92,255,.3);
  border-radius:var(--radius-lg);
  padding:56px 24px;
  text-align:center;
  cursor:pointer;
  transition:all .25s cubic-bezier(.4,0,.2,1);
  position:relative;
  overflow:hidden;
  backdrop-filter:blur(10px);
}
.upload-zone::before{
  content:"";
  position:absolute;
  inset:0;
  background:radial-gradient(ellipse at center, rgba(124,92,255,.12), transparent 70%);
  opacity:0;
  transition:opacity .3s;
  pointer-events:none;
}
.upload-zone:hover,.upload-zone.dragover{
  border-color:var(--accent);
  border-style:solid;
  background:linear-gradient(180deg, rgba(124,92,255,.08), rgba(124,92,255,.02));
  transform:translateY(-2px);
  box-shadow:0 20px 40px -20px rgba(124,92,255,.4);
}
.upload-zone:hover::before,.upload-zone.dragover::before{opacity:1}
.upload-zone .icon{
  font-size:48px;
  margin-bottom:16px;
  filter:drop-shadow(0 0 20px rgba(124,92,255,.5));
}
.upload-zone .text{
  font-size:15.5px;
  font-weight:600;
  color:var(--text);
  letter-spacing:-0.01em;
}
.upload-zone .hint{
  color:var(--text-3);
  font-size:12.5px;
  margin-top:10px;
  letter-spacing:0;
}

/* 链接输入 */
.link-input-wrap{
  display:flex;
  gap:10px;
  background:linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.01));
  border:1px solid var(--border-strong);
  border-radius:14px;
  padding:8px;
  backdrop-filter:blur(20px);
  transition:all .2s;
}
.link-input-wrap:focus-within{
  border-color:var(--accent);
  box-shadow:0 0 0 4px rgba(124,92,255,.12);
}
.link-input-wrap input{
  flex:1;
  background:transparent;
  border:none;
  color:var(--text);
  font-size:14px;
  outline:none;
  padding:8px 14px;
  font-family:inherit;
}
.link-input-wrap input::placeholder{color:var(--text-3)}
.link-input-wrap .btn-primary{padding:11px 24px;white-space:nowrap;border-radius:10px}
.link-hint{color:var(--text-3);font-size:12px;margin-top:12px;text-align:center}

/* 视频信息卡片 */
.video-info{
  display:none;
  margin-top:18px;
  background:linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.01));
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:16px;
  gap:16px;
  align-items:center;
  backdrop-filter:blur(20px);
}
.video-info.active{display:flex}
.video-info video{width:180px;border-radius:10px;background:#000;border:1px solid var(--border)}
.video-info .meta{flex:1}
.video-info .name{
  font-size:14px;
  font-weight:600;
  margin-bottom:6px;
  word-break:break-all;
  letter-spacing:-0.01em;
}
.video-info .line{font-size:13px;color:var(--text-2);margin-top:4px}
.video-info .price{
  background:linear-gradient(135deg, var(--accent-2), var(--ok));
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
  font-size:20px;
  font-weight:700;
  margin-top:10px;
  letter-spacing:-0.02em;
}

/* ================= 进度条 ================= */
.progress{display:none;margin-top:24px}
.progress.active{display:block}
.progress .bar{
  height:5px;
  background:rgba(255,255,255,.05);
  border-radius:3px;
  overflow:hidden;
  border:1px solid var(--border);
}
.progress .fill{
  height:100%;
  width:0;
  background:linear-gradient(90deg, var(--accent), var(--accent-2), var(--ok));
  background-size:200% 100%;
  border-radius:3px;
  transition:width .5s cubic-bezier(.4,0,.2,1);
  animation:progressFlow 2s linear infinite;
  box-shadow:0 0 12px rgba(124,92,255,.6);
}
@keyframes progressFlow{
  0%{background-position:0% 50%}
  100%{background-position:200% 50%}
}
.progress .text{text-align:center;color:var(--text-2);font-size:13px;margin-top:12px}

/* ================= 结果卡片 ================= */
.result{display:none;margin-top:28px}
.result.active{display:block}

.card{
  background:linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.015));
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:24px;
  margin-bottom:16px;
  backdrop-filter:blur(20px);
  position:relative;
  overflow:hidden;
}
.card::before{
  content:"";
  position:absolute;
  top:0;left:20%;right:20%;
  height:1px;
  background:linear-gradient(90deg, transparent, rgba(255,255,255,.2), transparent);
}
.card h3{
  color:var(--accent-3);
  font-size:13px;
  font-weight:600;
  margin-bottom:14px;
  letter-spacing:.02em;
  text-transform:uppercase;
}
.card pre{
  white-space:pre-wrap;
  font-family:"SF Mono",ui-monospace,Menlo,Consolas,monospace;
  font-size:13.5px;
  line-height:1.85;
  word-break:break-word;
  color:var(--text);
}
.card .row{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:14px;
  gap:14px;
}
.card .row label{
  font-size:13.5px;
  color:var(--text-2);
  flex-shrink:0;
  font-weight:500;
}
.card .row input,
.card .row select{
  flex:1;
  background:rgba(0,0,0,.25);
  border:1px solid var(--border);
  border-radius:10px;
  padding:11px 14px;
  color:var(--text);
  font-size:13.5px;
  outline:none;
  max-width:360px;
  font-family:inherit;
  transition:all .18s;
}
.card .row input:focus,
.card .row select:focus{
  border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(124,92,255,.15);
  background:rgba(0,0,0,.4);
}

/* ================= 表格 ================= */
.table{width:100%;border-collapse:collapse;font-size:13px}
.table th,.table td{
  padding:12px 10px;
  text-align:left;
  border-bottom:1px solid var(--border);
}
.table th{
  color:var(--text-3);
  font-weight:500;
  font-size:12px;
  letter-spacing:.04em;
  text-transform:uppercase;
}
.table tr:hover{background:rgba(255,255,255,.02)}
.table tr:last-child td{border-bottom:none}

/* ================= 登录/注册 ================= */
.auth-wrap{
  max-width:400px;
  margin:64px auto;
  background:linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.015));
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:36px;
  backdrop-filter:blur(30px);
  box-shadow:0 30px 60px -20px rgba(0,0,0,.6);
  position:relative;
}
.auth-wrap::before{
  content:"";
  position:absolute;
  top:0;left:20%;right:20%;
  height:1px;
  background:linear-gradient(90deg, transparent, rgba(167,139,250,.6), transparent);
}
.auth-wrap h2{
  margin-bottom:26px;
  text-align:center;
  font-size:22px;
  font-weight:700;
  letter-spacing:-0.02em;
}
.auth-wrap input{
  width:100%;
  padding:13px 16px;
  margin-bottom:12px;
  background:rgba(0,0,0,.3);
  border:1px solid var(--border);
  border-radius:10px;
  color:var(--text);
  font-size:14px;
  outline:none;
  font-family:inherit;
  transition:all .18s;
}
.auth-wrap input:focus{
  border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(124,92,255,.15);
  background:rgba(0,0,0,.5);
}
.auth-wrap .switch{
  text-align:center;
  font-size:13px;
  color:var(--text-3);
  margin-top:18px;
}
.auth-wrap .switch a{
  color:var(--accent-3);
  text-decoration:none;
  font-weight:500;
}
.auth-wrap .switch a:hover{color:var(--accent-2)}

/* ================= 提示 ================= */
.tip-box{
  background:linear-gradient(135deg, rgba(124,92,255,.08), rgba(34,211,238,.04));
  border:1px solid rgba(124,92,255,.2);
  padding:14px 18px;
  border-radius:12px;
  font-size:13.5px;
  margin-bottom:22px;
  color:var(--text-2);
  line-height:1.6;
  backdrop-filter:blur(10px);
}
.tip-box a{color:var(--accent-3);text-decoration:none;font-weight:500}
.tip-box a:hover{color:var(--accent-2)}
.tip-box b{color:var(--text)}

/* ================= Tab ================= */
.tabs{
  display:flex;
  gap:6px;
  margin-bottom:20px;
  flex-wrap:wrap;
  background:var(--surface);
  border:1px solid var(--border);
  padding:4px;
  border-radius:12px;
  width:fit-content;
  backdrop-filter:blur(10px);
}
.tab{
  background:transparent;
  color:var(--text-2);
  border:none;
  padding:9px 18px;
  border-radius:9px;
  cursor:pointer;
  font-size:13.5px;
  font-weight:500;
  font-family:inherit;
  transition:all .18s;
}
.tab:hover{color:var(--text)}
.tab.active{
  background:rgba(124,92,255,.15);
  color:var(--accent-3);
  font-weight:600;
  box-shadow:0 1px 0 rgba(255,255,255,.06) inset;
}
.tab-panel.hidden{display:none}

.user-card div{margin-bottom:12px;font-size:14px;color:var(--text-2)}
.user-card b{color:var(--accent-3);font-weight:600}

/* ================= 首页 - 功能亮点 ================= */
.features{margin-top:80px}
.section-heading{
  text-align:center;
  font-size:32px;
  font-weight:700;
  letter-spacing:-0.03em;
  margin-bottom:12px;
  background:linear-gradient(180deg, #fff, #a0a0b0);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.section-sub{
  text-align:center;
  color:var(--text-2);
  font-size:14.5px;
  margin-bottom:36px;
  line-height:1.7;
}
.feature-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(230px, 1fr));
  gap:18px;
  margin-top:36px;
}
.feature-card{
  background:linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,.01));
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:28px 22px;
  transition:all .25s cubic-bezier(.4,0,.2,1);
  position:relative;
  overflow:hidden;
  backdrop-filter:blur(20px);
}
.feature-card::before{
  content:"";
  position:absolute;
  top:0;left:20%;right:20%;
  height:1px;
  background:linear-gradient(90deg, transparent, rgba(255,255,255,.15), transparent);
}
.feature-card:hover{
  transform:translateY(-4px);
  border-color:rgba(124,92,255,.4);
  box-shadow:0 20px 40px -20px rgba(124,92,255,.35);
  background:linear-gradient(180deg, rgba(124,92,255,.06), rgba(255,255,255,.01));
}
.feature-icon{
  font-size:32px;
  margin-bottom:14px;
  filter:drop-shadow(0 0 12px rgba(124,92,255,.4));
}
.feature-card h3{
  font-size:15.5px;
  font-weight:600;
  margin-bottom:8px;
  letter-spacing:-0.01em;
  color:var(--text);
}
.feature-card p{
  font-size:13px;
  color:var(--text-2);
  line-height:1.7;
}

/* ================= 首页 - 使用步骤 ================= */
.steps{margin-top:80px}
.step-list{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:16px;
  margin-top:36px;
  flex-wrap:wrap;
}
.step-item{
  background:linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,.01));
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:32px 24px;
  text-align:center;
  flex:1;
  min-width:180px;
  max-width:240px;
  backdrop-filter:blur(20px);
  position:relative;
  overflow:hidden;
}
.step-item::before{
  content:"";
  position:absolute;
  top:0;left:20%;right:20%;
  height:1px;
  background:linear-gradient(90deg, transparent, rgba(255,255,255,.15), transparent);
}
.step-num{
  width:44px;
  height:44px;
  line-height:44px;
  border-radius:12px;
  background:linear-gradient(135deg, var(--accent), #6a48f0);
  color:#fff;
  font-weight:700;
  font-size:18px;
  margin:0 auto 16px;
  box-shadow:
    0 1px 0 rgba(255,255,255,.2) inset,
    0 8px 20px -8px rgba(124,92,255,.6);
}
.step-item h3{font-size:15px;font-weight:600;margin-bottom:8px;letter-spacing:-0.01em}
.step-item p{font-size:13px;color:var(--text-2);line-height:1.6}
.step-arrow{
  font-size:20px;
  color:var(--text-3);
  font-weight:300;
}

/* ================= 首页 - 案例展示 ================= */
.home-examples{margin-top:80px}
.examples-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(320px, 1fr));
  gap:20px;
  margin-top:32px;
}
.example-card{
  background:linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,.01));
  border:1px solid var(--border);
  border-radius:var(--radius);
  overflow:hidden;
  backdrop-filter:blur(20px);
  transition:all .25s cubic-bezier(.4,0,.2,1);
  position:relative;
}
.example-card::before{
  content:"";
  position:absolute;
  top:0;left:20%;right:20%;
  height:1px;
  background:linear-gradient(90deg, transparent, rgba(255,255,255,.15), transparent);
  z-index:2;
}
.example-card:hover{
  transform:translateY(-4px);
  border-color:rgba(124,92,255,.4);
  box-shadow:0 20px 40px -20px rgba(124,92,255,.35);
}
.example-video video{
  width:100%;
  display:block;
  background:#000;
  max-height:240px;
  object-fit:contain;
  border-bottom:1px solid var(--border);
}
.example-content{padding:22px}
.example-content h3{
  font-size:15.5px;
  font-weight:600;
  margin-bottom:8px;
  letter-spacing:-0.01em;
  color:var(--text);
}
.example-desc{font-size:13px;color:var(--text-2);margin-bottom:14px;line-height:1.6}
.example-prompt{
  background:rgba(0,0,0,.3);
  border:1px solid var(--border);
  border-radius:10px;
  padding:14px;
  max-height:200px;
  overflow-y:auto;
}
.example-prompt pre{
  font-size:12px;
  line-height:1.7;
  white-space:pre-wrap;
  color:var(--text-2);
  font-family:"SF Mono",ui-monospace,Menlo,Consolas,monospace;
}
.btn-copy{
  margin-top:14px;
  background:rgba(124,92,255,.1);
  color:var(--accent-3);
  border:1px solid rgba(124,92,255,.25);
  padding:8px 16px;
  border-radius:8px;
  cursor:pointer;
  font-size:13px;
  font-weight:500;
  font-family:inherit;
  transition:all .18s;
}
.btn-copy:hover{
  background:rgba(124,92,255,.2);
  border-color:rgba(124,92,255,.5);
  color:#fff;
}

/* ================= 首页 - 价格方案 ================= */
.pricing{margin-top:80px}
.pricing-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(250px, 1fr));
  gap:20px;
  margin-top:36px;
}
.pricing-card{
  background:linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,.01));
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:36px 26px;
  text-align:center;
  position:relative;
  transition:all .25s cubic-bezier(.4,0,.2,1);
  backdrop-filter:blur(20px);
  overflow:hidden;
}
.pricing-card::before{
  content:"";
  position:absolute;
  top:0;left:20%;right:20%;
  height:1px;
  background:linear-gradient(90deg, transparent, rgba(255,255,255,.15), transparent);
}
.pricing-card:hover{
  transform:translateY(-4px);
  border-color:rgba(124,92,255,.4);
  box-shadow:0 20px 40px -20px rgba(124,92,255,.35);
}
.pricing-card.featured{
  border-color:rgba(124,92,255,.5);
  background:linear-gradient(180deg, rgba(124,92,255,.08), rgba(255,255,255,.01));
  box-shadow:0 20px 50px -20px rgba(124,92,255,.5);
}
.pricing-badge{
  position:absolute;
  top:-1px;
  left:50%;
  transform:translateX(-50%);
  background:linear-gradient(135deg, var(--accent), #6a48f0);
  color:#fff;
  font-size:11.5px;
  padding:5px 16px;
  border-radius:0 0 10px 10px;
  font-weight:600;
  letter-spacing:.02em;
  box-shadow:0 4px 12px rgba(124,92,255,.4);
}
.pricing-card h3{
  font-size:15px;
  font-weight:600;
  margin-bottom:18px;
  color:var(--text-2);
  letter-spacing:.02em;
  text-transform:uppercase;
  font-size:12px;
}
.pricing-card .price{
  font-size:38px;
  font-weight:800;
  letter-spacing:-0.03em;
  margin-bottom:6px;
  background:linear-gradient(180deg, #fff, #b0b0c0);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.pricing-card.featured .price{
  background:linear-gradient(135deg, var(--accent-3), var(--ok));
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.pricing-card .credits{
  font-size:13px;
  color:var(--accent-3);
  margin-bottom:22px;
  font-weight:500;
}
.pricing-card ul{
  list-style:none;
  padding:0;
  margin:0 0 26px;
  text-align:left;
}
.pricing-card li{
  font-size:13px;
  color:var(--text-2);
  padding:9px 0;
  border-bottom:1px solid var(--border);
  line-height:1.5;
}
.pricing-card li:last-child{border-bottom:none}
.pricing-card li::before{
  content:'✓';
  color:var(--ok);
  font-weight:700;
  margin-right:8px;
}

/* ================= 首页 - FAQ ================= */
.faq-home{margin-top:80px;margin-bottom:40px}
.faq-list{display:grid;gap:12px;margin-top:32px}
.faq-item{
  background:linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,.01));
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:22px 24px;
  transition:all .2s;
}
.faq-item:hover{border-color:var(--border-strong)}
.faq-item h4{
  font-size:14.5px;
  font-weight:600;
  margin-bottom:8px;
  color:var(--text);
  letter-spacing:-0.01em;
}
.faq-item p{font-size:13.5px;color:var(--text-2);line-height:1.7}

/* ================= 使用指南 ================= */
.guide-section{
  background:linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,.01));
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:36px;
  margin-bottom:22px;
  backdrop-filter:blur(20px);
}
.guide-section h2{
  font-size:17px;
  font-weight:600;
  margin-bottom:12px;
  color:var(--accent-3);
  letter-spacing:-0.01em;
}
.guide-section p{
  font-size:14px;
  line-height:1.9;
  color:var(--text-2);
  margin-bottom:22px;
}
.guide-section p:last-child{margin-bottom:0}
.guide-section b{color:var(--accent-2);font-weight:600}

/* ================= 后台案例管理 ================= */
.example-admin-card{
  border:1px solid var(--border);
  margin-bottom:16px;
}
.example-admin-card .row textarea{
  width:100%;
  background:rgba(0,0,0,.3);
  border:1px solid var(--border);
  border-radius:10px;
  padding:12px 14px;
  color:var(--text);
  font-size:13px;
  font-family:"SF Mono",ui-monospace,Menlo,Consolas,monospace;
  resize:vertical;
  outline:none;
  max-width:100%;
  transition:all .18s;
}
.example-admin-card .row textarea:focus{
  border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(124,92,255,.15);
}

/* ================= 滚动条 ================= */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{
  background:rgba(255,255,255,.08);
  border-radius:5px;
  border:2px solid transparent;
  background-clip:content-box;
}
::-webkit-scrollbar-thumb:hover{background:rgba(124,92,255,.4);background-clip:content-box}

/* ================= 响应式 ================= */
@media (max-width:768px){
  .navbar{padding:12px 16px}
  .container{padding:24px 16px}
  .hero{padding:32px 0 16px}
  .hero-title{font-size:32px}
  .hero-sub{font-size:14px}
  .section-heading{font-size:24px}
  .features,.steps,.home-examples,.pricing,.faq-home{margin-top:56px}
  .step-arrow{display:none}
  .step-list{flex-direction:column}
  .step-item{max-width:100%;width:100%}
  .link-input-wrap{flex-direction:column}
  .link-input-wrap .btn-primary{width:100%}
  .video-info{flex-direction:column;align-items:stretch}
  .video-info video{width:100%}
  .card .row{flex-direction:column;align-items:stretch}
  .card .row input,.card .row select{max-width:none}
  .tabs{width:100%;justify-content:center}
  .tab{padding:8px 14px;font-size:13px}
  .nav-right .link{padding:6px 10px;font-size:13px}
}
/* =========================================================
   站点底部 Footer
   ========================================================= */
.site-footer{
  margin-top:80px;
  border-top:1px solid var(--border);
  background:linear-gradient(180deg, rgba(255,255,255,.012), transparent 60%);
  position:relative;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:15%;right:15%;
  height:1px;
  background:linear-gradient(90deg, transparent, rgba(124,92,255,.5), transparent);
}

.footer-inner{
  max-width:960px;
  margin:0 auto;
  padding:56px 24px 32px;
}

/* 四栏网格 */
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:40px 32px;
  margin-bottom:48px;
}

.footer-brand .footer-logo{
  font-size:20px;
  font-weight:700;
  letter-spacing:-0.02em;
  background:linear-gradient(135deg, #fff 0%, var(--accent-2) 100%);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
  text-decoration:none;
  display:inline-block;
  margin-bottom:14px;
}
.footer-desc{
  font-size:13.5px;
  color:var(--text-2);
  line-height:1.75;
  max-width:280px;
}

.footer-col h4{
  font-size:12.5px;
  font-weight:600;
  color:var(--text);
  letter-spacing:.06em;
  text-transform:uppercase;
  margin-bottom:18px;
}
.footer-col ul{
  list-style:none;
  padding:0;
  margin:0;
}
.footer-col li{margin-bottom:12px}
.footer-col a{
  font-size:13.5px;
  color:var(--text-2);
  text-decoration:none;
  transition:color .18s;
  display:inline-block;
}
.footer-col a:hover{color:var(--accent-3)}

/* 品牌声明 */
.footer-notice{
  border-top:1px solid var(--border);
  padding-top:28px;
  margin-bottom:24px;
}
.footer-notice p{
  font-size:12.5px;
  color:var(--text-3);
  line-height:1.85;
  text-align:center;
}
.footer-notice strong{
  color:var(--text-2);
  font-weight:600;
}
.footer-domain{
  color:var(--accent-3);
  font-weight:500;
}
.footer-notice a{
  color:var(--accent-3);
  text-decoration:none;
  margin-left:4px;
}
.footer-notice a:hover{color:var(--accent-2);text-decoration:underline}

/* 版权 */
.footer-bottom{
  border-top:1px solid var(--border);
  padding-top:24px;
  text-align:center;
}
.footer-bottom p{
  font-size:12.5px;
  color:var(--text-3);
  letter-spacing:.01em;
}

/* 悬浮客服按钮 */
.float-support{
  position:fixed;
  right:28px;
  bottom:28px;
  width:48px;
  height:48px;
  border-radius:50%;
  background:linear-gradient(135deg, var(--accent), #6a48f0);
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  text-decoration:none;
  box-shadow:
    0 1px 0 rgba(255,255,255,.2) inset,
    0 8px 24px -6px rgba(124,92,255,.6);
  transition:all .25s cubic-bezier(.4,0,.2,1);
  z-index:200;
}
.float-support svg{width:22px;height:22px}
.float-support:hover{
  transform:translateY(-3px) scale(1.05);
  box-shadow:
    0 1px 0 rgba(255,255,255,.25) inset,
    0 12px 32px -6px rgba(124,92,255,.8);
}

/* 响应式 */
@media (max-width:768px){
  .footer-grid{
    grid-template-columns:1fr 1fr;
    gap:32px 24px;
  }
  .footer-brand{
    grid-column:1 / -1;
  }
  .footer-desc{max-width:none}
  .float-support{right:16px;bottom:16px;width:44px;height:44px}
  .float-support svg{width:20px;height:20px}
}
@media (max-width:480px){
  .footer-grid{grid-template-columns:1fr}
  .footer-inner{padding:40px 20px 24px}
}
/* =========================================================
   案例库页面
   ========================================================= */
.cases-hero{
  text-align:center;
  padding:48px 0 8px;
}
.cases-title{
  font-size:42px;
  font-weight:800;
  letter-spacing:-0.035em;
  line-height:1.1;
  margin-bottom:14px;
  background:linear-gradient(180deg, #ffffff 0%, #d0d0dd 50%, #8b8ba0 100%);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.cases-sub{
  color:var(--text-2);
  font-size:15px;
  line-height:1.8;
}

/* 筛选标签 */
.cases-filter{
  display:flex;
  justify-content:center;
  gap:8px;
  flex-wrap:wrap;
  margin:36px auto 32px;
  max-width:720px;
}
.filter-btn{
  background:var(--surface);
  border:1px solid var(--border);
  color:var(--text-2);
  padding:8px 20px;
  border-radius:24px;
  font-size:13.5px;
  font-weight:500;
  cursor:pointer;
  font-family:inherit;
  transition:all .2s cubic-bezier(.4,0,.2,1);
  backdrop-filter:blur(10px);
}
.filter-btn:hover{
  color:var(--text);
  border-color:var(--border-highlight);
  background:var(--surface-hover);
}
.filter-btn.active{
  background:linear-gradient(135deg, var(--accent), #6a48f0);
  color:#fff;
  border-color:transparent;
  box-shadow:
    0 1px 0 rgba(255,255,255,.15) inset,
    0 4px 12px -4px rgba(124,92,255,.6);
}

/* 案例网格 */
.cases-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(340px, 1fr));
  gap:24px;
  margin-top:8px;
}

/* 案例卡片 */
.case-card{
  background:linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,.01));
  border:1px solid var(--border);
  border-radius:var(--radius);
  overflow:hidden;
  backdrop-filter:blur(20px);
  transition:all .3s cubic-bezier(.4,0,.2,1);
  position:relative;
  display:flex;
  flex-direction:column;
}
.case-card::before{
  content:"";
  position:absolute;
  top:0;left:20%;right:20%;
  height:1px;
  background:linear-gradient(90deg, transparent, rgba(255,255,255,.15), transparent);
  z-index:2;
}
.case-card:hover{
  transform:translateY(-6px);
  border-color:rgba(124,92,255,.4);
  box-shadow:
    0 24px 48px -24px rgba(124,92,255,.4),
    0 0 0 1px rgba(124,92,255,.1);
}

/* 视频区域 */
.case-video-wrap{
  position:relative;
  background:#000;
  aspect-ratio:16 / 9;
  overflow:hidden;
}
.case-video-wrap video{
  width:100%;
  height:100%;
  display:block;
  object-fit:contain;
}
.case-no-video{
  display:flex;
  align-items:center;
  justify-content:center;
  background:linear-gradient(135deg, rgba(124,92,255,.08), rgba(34,211,238,.04));
}
.case-placeholder{font-size:48px;opacity:.4}
.case-video-overlay{
  position:absolute;
  top:12px;
  left:12px;
  z-index:3;
  pointer-events:none;
}
.case-cat-badge{
  display:inline-block;
  background:rgba(8,8,12,.72);
  backdrop-filter:blur(10px);
  border:1px solid var(--border-highlight);
  color:var(--accent-3);
  padding:4px 12px;
  border-radius:16px;
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.02em;
}

/* 卡片内容 */
.case-body{
  padding:20px;
  display:flex;
  flex-direction:column;
  flex:1;
}
.case-title{
  font-size:16px;
  font-weight:600;
  letter-spacing:-0.015em;
  margin-bottom:8px;
  color:var(--text);
  line-height:1.4;
}
.case-desc{
  font-size:13px;
  color:var(--text-2);
  line-height:1.65;
  margin-bottom:14px;
}

/* 提示词盒子 */
.case-prompt-box{
  background:rgba(0,0,0,.3);
  border:1px solid var(--border);
  border-radius:10px;
  overflow:hidden;
  flex:1;
  display:flex;
  flex-direction:column;
  min-height:0;
}
.case-prompt-header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:10px 14px;
  border-bottom:1px solid var(--border);
  font-size:12px;
  color:var(--text-3);
  letter-spacing:.04em;
  text-transform:uppercase;
  font-weight:600;
  background:rgba(255,255,255,.015);
}
.case-copy-btn{
  display:inline-flex;
  align-items:center;
  gap:5px;
  background:rgba(124,92,255,.1);
  border:1px solid rgba(124,92,255,.25);
  color:var(--accent-3);
  padding:4px 10px;
  border-radius:6px;
  font-size:11.5px;
  font-weight:500;
  cursor:pointer;
  font-family:inherit;
  transition:all .18s;
}
.case-copy-btn:hover{
  background:rgba(124,92,255,.22);
  border-color:rgba(124,92,255,.5);
  color:#fff;
}
.case-copy-btn svg{flex-shrink:0}

.case-prompt{
  padding:14px;
  font-family:"SF Mono", ui-monospace, Menlo, Consolas, monospace;
  font-size:12px;
  line-height:1.75;
  color:var(--text-2);
  white-space:pre-wrap;
  word-break:break-word;
  overflow-y:auto;
  max-height:180px;
  flex:1;
  margin:0;
}

/* 卡片入场动画 */
@keyframes cardIn{
  from{opacity:0;transform:translateY(12px)}
  to{opacity:1;transform:translateY(0)}
}
.case-card{
  animation:cardIn .45s cubic-bezier(.4,0,.2,1) both;
}

/* 响应式 */
@media (max-width:768px){
  .cases-hero{padding:28px 0 4px}
  .cases-title{font-size:30px}
  .cases-sub{font-size:13.5px}
  .cases-filter{margin:24px auto 20px;gap:6px}
  .filter-btn{padding:7px 16px;font-size:13px}
  .cases-grid{
    grid-template-columns:1fr;
    gap:18px;
  }
  .case-prompt{max-height:150px}
}
/* =========================================================
   图片预览（首页新增）
   ========================================================= */
.image-info {
  display: none;
  margin-top: 18px;
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.01));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  gap: 16px;
  align-items: center;
  backdrop-filter: blur(20px);
}
.image-info img {
  width: 180px;
  height: 180px;
  object-fit: contain;
  border-radius: 10px;
  background: #000;
  border: 1px solid var(--border);
}
.image-info .meta { flex: 1; }
.image-info .name {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
  word-break: break-all;
}
.image-info .line { font-size: 13px; color: var(--text-2); }
.image-info .price {
  background: linear-gradient(135deg, var(--accent-2), var(--ok));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 18px;
  font-weight: 700;
  margin-top: 10px;
}

@media (max-width: 768px) {
  .image-info { flex-direction: column; align-items: stretch; }
  .image-info img { width: 100%; height: auto; max-height: 260px; }
}