/* =============================================================================
   TokenHub 商城落地页样式
   纯手写，无框架无依赖。改主题色只需改下面这几个变量。
   ============================================================================= */

:root {
  --c-bg:        #ffffff;
  --c-bg-alt:    #f6f8fc;
  --c-surface:   #ffffff;
  --c-border:    #e5e8ef;
  --c-border-2:  #d6dbe6;
  --c-text:      #14181f;
  --c-text-2:    #5b6474;
  --c-text-3:    #8b94a5;
  --c-primary:   #2f5cf6;
  --c-primary-d: #1f45c9;
  --c-primary-l: #eaf0ff;
  --c-green:     #12a150;
  --c-green-l:   #e6f7ee;
  --c-amber:     #c47d00;
  --c-amber-l:   #fff4e0;
  --c-purple:    #7a3ff2;
  --c-purple-l:  #f1eaff;
  --c-blue:      #1e7fd6;
  --c-blue-l:    #e6f2fd;
  --c-pink:      #c22a72;
  --c-pink-l:    #fdeaf3;
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 18px;
  --shadow-sm: 0 1px 2px rgba(20, 24, 31, .06), 0 1px 3px rgba(20, 24, 31, .04);
  --shadow-md: 0 4px 12px rgba(20, 24, 31, .07), 0 2px 4px rgba(20, 24, 31, .04);
  --shadow-lg: 0 18px 48px rgba(20, 24, 31, .10);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --mono: "SFMono-Regular", ui-monospace, Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.65;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
code { font-family: var(--mono); font-size: .88em; background: var(--c-bg-alt);
       border: 1px solid var(--c-border); border-radius: 5px; padding: .1em .4em; }
h1, h2, h3 { line-height: 1.25; margin: 0; letter-spacing: -.015em; }
p { margin: 0; }

.wrap { width: 100%; max-width: 1140px; margin: 0 auto; padding: 0 24px; }
.wrap-narrow { max-width: 780px; }
.muted { color: var(--c-text-3); font-size: 13px; }

/* ============================== 按钮 ============================== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 18px; border-radius: var(--r-sm); font-size: 14px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; transition: .16s ease;
  white-space: nowrap; font-family: inherit;
}
.btn-lg { padding: 13px 28px; font-size: 15px; border-radius: 10px; }
.btn-primary { background: var(--c-primary); color: #fff; box-shadow: 0 1px 2px rgba(47,92,246,.3); }
.btn-primary:hover { background: var(--c-primary-d); transform: translateY(-1px);
                     box-shadow: 0 6px 18px rgba(47,92,246,.28); }
.btn-ghost { background: var(--c-surface); border-color: var(--c-border-2); color: var(--c-text); }
.btn-ghost:hover { border-color: var(--c-primary); color: var(--c-primary); background: var(--c-primary-l); }

/* ============================== 导航 ============================== */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.86);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--c-border);
}
.nav-inner { display: flex; align-items: center; gap: 28px; height: 62px; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 800;
         font-size: 16.5px; letter-spacing: -.02em; }
.brand-dot {
  width: 20px; height: 20px; border-radius: 6px; flex: none;
  background: linear-gradient(135deg, #2f5cf6, #7a3ff2);
  box-shadow: 0 2px 8px rgba(47,92,246,.4);
}
.nav-links { display: flex; gap: 22px; font-size: 14px; color: var(--c-text-2); flex: 1; }
.nav-links a:hover { color: var(--c-primary); }
.nav-cta { display: flex; gap: 10px; }

/* ============================== HERO ============================== */
.hero {
  position: relative; overflow: hidden;
  padding: 78px 0 68px;
  background:
    radial-gradient(900px 420px at 12% -12%, #e8efff 0%, transparent 62%),
    radial-gradient(760px 380px at 90% 0%, #f2eaff 0%, transparent 60%),
    var(--c-bg);
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(var(--c-border) 1px, transparent 1px),
                    linear-gradient(90deg, var(--c-border) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(700px 340px at 50% 0%, #000 0%, transparent 78%);
  opacity: .55;
}
.hero-inner { position: relative; z-index: 1; text-align: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 14px 5px 11px; border-radius: 999px;
  background: var(--c-surface); border: 1px solid var(--c-border);
  font-size: 12.5px; color: var(--c-text-2); box-shadow: var(--shadow-sm);
}
.pulse {
  width: 7px; height: 7px; border-radius: 50%; background: var(--c-green); flex: none;
  box-shadow: 0 0 0 3px rgba(18,161,80,.16);
  animation: pulse 2s infinite;
}
.pulse.down { background: #e5484d; box-shadow: 0 0 0 3px rgba(229,72,77,.16); }
@keyframes pulse { 50% { opacity: .45; } }

.hero h1 { font-size: 52px; font-weight: 820; margin: 22px 0 0; }
.hero-sub { max-width: 620px; margin: 18px auto 0; color: var(--c-text-2); font-size: 16.5px; }
.hero-cta { display: flex; gap: 12px; justify-content: center; margin-top: 32px; flex-wrap: wrap; }

.code-card {
  max-width: 660px; margin: 44px auto 0; text-align: left;
  border-radius: var(--r-md); overflow: hidden;
  border: 1px solid var(--c-border-2); background: #0f1420;
  box-shadow: var(--shadow-lg);
}
.code-head { display: flex; align-items: center; gap: 6px; padding: 10px 14px;
             background: #161c2b; border-bottom: 1px solid #232b3d; }
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot.r { background: #ff5f57; } .dot.y { background: #febc2e; } .dot.g { background: #28c840; }
.code-title { margin-left: 8px; font-size: 11.5px; color: #7d8798; font-family: var(--mono); }
.code-body { position: relative; margin: 0; padding: 18px 20px; overflow-x: auto; }
.code-body code { background: none; border: none; padding: 0;
                  color: #c8d3e8; font-size: 12.8px; line-height: 1.85; white-space: pre; }
.copy {
  position: absolute; top: 12px; right: 12px; z-index: 2;
  padding: 4px 11px; font-size: 11.5px; font-family: inherit; cursor: pointer;
  color: #9aa6bd; background: #1e2536; border: 1px solid #2c354a;
  border-radius: 6px; transition: .15s;
}
.copy:hover { color: #fff; border-color: #3d4a66; }
.copy.done { color: #4ade80; border-color: #25603c; }

.hero-stats {
  display: flex; justify-content: center; gap: 56px; flex-wrap: wrap;
  list-style: none; margin: 46px 0 0; padding: 0;
}
.hero-stats li { display: flex; flex-direction: column; align-items: center; }
.hero-stats b { font-size: 26px; font-weight: 780; letter-spacing: -.02em; }
.hero-stats b small { font-size: 14px; font-weight: 600; color: var(--c-text-3); }
.hero-stats span { font-size: 12.5px; color: var(--c-text-3); margin-top: 2px; }

/* ============================== 区块 ============================== */
.section { padding: 76px 0; }
.section-alt { background: var(--c-bg-alt); border-block: 1px solid var(--c-border); }
.section-title { font-size: 31px; font-weight: 780; text-align: center; }
.section-sub { text-align: center; color: var(--c-text-2); margin-top: 12px; }

.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 44px; }
.card {
  padding: 26px 22px; border: 1px solid var(--c-border); border-radius: var(--r-md);
  background: var(--c-surface); box-shadow: var(--shadow-sm); transition: .18s ease;
}
.card:hover { border-color: var(--c-border-2); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card h3 { font-size: 16px; margin: 14px 0 8px; }
.card p { font-size: 13.5px; color: var(--c-text-2); line-height: 1.7; }
.card code { font-size: 12px; }
.ico {
  width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center;
  font-size: 19px; line-height: 1;
}
.ico-blue   { background: var(--c-blue-l); }
.ico-green  { background: var(--c-green-l); }
.ico-amber  { background: var(--c-amber-l); }
.ico-purple { background: var(--c-purple-l); }

/* ============================== 价格表 ============================== */
.price-toolbar {
  display: flex; align-items: center; gap: 16px; margin: 34px 0 18px; flex-wrap: wrap;
}
#modelSearch {
  flex: 1 1 260px; min-width: 200px; padding: 11px 15px; font-size: 14px; font-family: inherit;
  border: 1px solid var(--c-border-2); border-radius: var(--r-sm); background: var(--c-surface);
  color: var(--c-text); outline: none; transition: .15s;
}
#modelSearch:focus { border-color: var(--c-primary); box-shadow: 0 0 0 3px var(--c-primary-l); }
.group-tabs { display: flex; gap: 6px; background: var(--c-bg-alt); padding: 4px;
              border-radius: var(--r-sm); border: 1px solid var(--c-border); }
.group-tabs button {
  padding: 7px 15px; font-size: 13px; font-family: inherit; font-weight: 600; cursor: pointer;
  border: none; border-radius: 6px; background: transparent; color: var(--c-text-2); transition: .15s;
}
.group-tabs button.active { background: var(--c-surface); color: var(--c-primary); box-shadow: var(--shadow-sm); }

/* 模态筛选条：带每类模型数量，一眼看出站点接了哪些能力 */
.mod-tabs { display: flex; gap: 8px; margin: 26px 0 -8px; flex-wrap: wrap; }
.mod-tabs button {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 14px; font-size: 13px; font-family: inherit; font-weight: 600; cursor: pointer;
  border: 1px solid var(--c-border); border-radius: 999px;
  background: var(--c-surface); color: var(--c-text-2); transition: .15s;
}
.mod-tabs button:hover { border-color: var(--c-border-2); color: var(--c-text); }
.mod-tabs button.active {
  background: var(--c-primary); border-color: var(--c-primary); color: #fff; box-shadow: var(--shadow-sm);
}
.mod-tabs .cnt {
  font-size: 11px; font-weight: 700; padding: 1px 7px; border-radius: 999px;
  background: var(--c-bg-alt); color: var(--c-text-3);
}
.mod-tabs button.active .cnt { background: rgba(255, 255, 255, .22); color: #fff; }

/* 模型名后的模态徽章 */
.mod-badge {
  display: inline-block; margin-left: 8px; padding: 1px 8px; border-radius: 999px;
  font-size: 11px; font-weight: 700; white-space: nowrap;
  background: var(--c-bg-alt); color: var(--c-text-2); border: 1px solid var(--c-border);
}
.mod-badge.mod-text  { background: var(--c-blue-l);   color: var(--c-blue);   border-color: transparent; }
.mod-badge.mod-image { background: var(--c-purple-l); color: var(--c-purple); border-color: transparent; }
.mod-badge.mod-video { background: var(--c-amber-l);  color: var(--c-amber);  border-color: transparent; }
.mod-badge.mod-music { background: var(--c-pink-l);   color: var(--c-pink);   border-color: transparent; }
.mod-badge.mod-audio { background: var(--c-green-l);  color: var(--c-green);  border-color: transparent; }
.mod-badge.mod-embed { background: var(--c-bg-alt);   color: var(--c-text-3); }

/* 接入示例 tab */
.example-tabs { display: flex; gap: 8px; margin: 30px 0 16px; flex-wrap: wrap; }
.example-tabs button {
  padding: 9px 18px; font-size: 13.5px; font-family: inherit; font-weight: 600; cursor: pointer;
  border: 1px solid var(--c-border); border-radius: var(--r-sm);
  background: var(--c-surface); color: var(--c-text-2); transition: .15s;
}
.example-tabs button:hover { border-color: var(--c-border-2); color: var(--c-text); }
.example-tabs button.active {
  background: var(--c-primary-l); border-color: var(--c-primary); color: var(--c-primary);
}

.table-wrap {
  border: 1px solid var(--c-border); border-radius: var(--r-md);
  background: var(--c-surface); overflow: hidden; box-shadow: var(--shadow-sm);
}
.price-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.price-table thead th {
  position: sticky; top: 0; background: var(--c-bg-alt); z-index: 1;
  text-align: left; padding: 12px 18px; font-size: 12.5px; font-weight: 700;
  color: var(--c-text-2); border-bottom: 1px solid var(--c-border);
  letter-spacing: .02em; text-transform: uppercase;
}
.price-table th.num, .price-table td.num { text-align: right; font-variant-numeric: tabular-nums; }
.price-table tbody td { padding: 11px 18px; border-bottom: 1px solid #f0f2f7; }
.price-table tbody tr:last-child td { border-bottom: none; }
.price-table tbody tr:hover { background: #fafbfe; }
.model-name { font-family: var(--mono); font-size: 12.8px; font-weight: 600; }
.badge {
  display: inline-block; padding: 2px 9px; border-radius: 999px;
  font-size: 11.5px; font-weight: 700; background: var(--c-primary-l); color: var(--c-primary);
}
.badge.per-call { background: var(--c-amber-l); color: var(--c-amber); }
.per-call-type { color: var(--c-text-3); font-size: 12.5px; }
.empty { text-align: center; padding: 46px 0; color: var(--c-text-3); }
.loading-row { text-align: center; padding: 46px 0; color: var(--c-text-3); }
.price-note { margin-top: 14px; font-size: 12.5px; color: var(--c-text-3); text-align: center; }

/* ============================== 充值 ============================== */
.recharge-actions { display: flex; align-items: center; justify-content: center;
                    gap: 18px; margin-top: 34px; flex-wrap: wrap; }
.pack { text-align: center; position: relative; }
.pack .amount { font-size: 30px; font-weight: 800; letter-spacing: -.02em; margin: 6px 0 2px; }
.pack .amount small { font-size: 16px; font-weight: 700; }
.pack .orig { font-size: 13px; color: var(--c-text-3); text-decoration: line-through; }
.pack .tag {
  position: absolute; top: -10px; right: 16px; padding: 3px 11px; border-radius: 999px;
  font-size: 11.5px; font-weight: 800; background: var(--c-primary); color: #fff;
  box-shadow: 0 3px 10px rgba(47,92,246,.35);
}
.pack .desc { font-size: 13px; color: var(--c-text-2); margin-top: 10px; }
.pack.featured { border-color: var(--c-primary); box-shadow: 0 8px 26px rgba(47,92,246,.14); }

/* ============================== FAQ ============================== */
.faq { margin-top: 34px; border: 1px solid var(--c-border); border-radius: var(--r-md);
       background: var(--c-surface); overflow: hidden; box-shadow: var(--shadow-sm); }
.faq-item { border-bottom: 1px solid var(--c-border); }
.faq-item:last-child { border-bottom: none; }
.faq-q {
  width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 16px;
  padding: 17px 20px; font-size: 14.5px; font-weight: 600; font-family: inherit;
  background: none; border: none; cursor: pointer; text-align: left; color: var(--c-text);
}
.faq-q:hover { background: var(--c-bg-alt); }
.faq-q .chev { color: var(--c-text-3); transition: transform .2s; flex: none; font-size: 12px; }
.faq-item.open .chev { transform: rotate(180deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .26s ease;
         font-size: 13.5px; color: var(--c-text-2); }
.faq-item.open .faq-a { max-height: 420px; }
.faq-a-inner { padding: 0 20px 18px; }
.faq-a code { font-size: 12px; }

/* ============================== 页脚 ============================== */
.footer { border-top: 1px solid var(--c-border); padding: 40px 0; background: var(--c-bg-alt); }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; gap: 30px; flex-wrap: wrap; }
.footer .brand { font-size: 15px; margin-bottom: 10px; }
.footer-links { display: flex; gap: 22px; font-size: 13.5px; color: var(--c-text-2); flex-wrap: wrap; }
.footer-links a:hover { color: var(--c-primary); }

/* ============================== 响应式 ============================== */
@media (max-width: 960px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .hero h1 { font-size: 40px; }
}
@media (max-width: 720px) {
  .nav-links { display: none; }
  .hero { padding: 52px 0 46px; }
  .hero h1 { font-size: 31px; }
  .hero-sub { font-size: 15px; }
  .hero-stats { gap: 30px; }
  .grid-4 { grid-template-columns: 1fr; }
  .section { padding: 54px 0; }
  .section-title { font-size: 25px; }
  .price-table thead th:nth-child(5),
  .price-table tbody td:nth-child(5) { display: none; }
  .table-wrap { overflow-x: auto; }
}