/**
 * SportsDeep 官网全站样式。
 *
 * 配色与微信小程序保持一致（真相源：miniprogram 的设计口径）：
 *   底  #06090E   卡片 #0E141B   描边 #1D2833
 *   主青 #00C2FF  紫  #A76EFF
 *   文字 #E9F1F7 / #A5B3BF / #77838F
 *
 * 纯静态站点，无构建步骤 —— 改完保存刷新即生效。
 */
:root {
  --bg: #06090E;
  --card: #0E141B;
  --card2: #111a23;
  --line: #1D2833;
  --cyan: #00C2FF;
  --purple: #A76EFF;
  --t1: #E9F1F7;
  --t2: #A5B3BF;
  --t3: #77838F;
  --danger: #ff5d6c;
  --ok: #2ee6a8;
  --maxw: 1120px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--t1);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ── 页头 ─────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(6, 9, 14, 0.82);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.site-header .bar {
  display: flex; align-items: center; gap: 28px;
  height: 62px;
}
.brand { display: flex; align-items: center; gap: 10px; flex: none; }
.brand img.mark { width: 34px; height: 34px; border-radius: 9px; }
.brand img.word { height: 20px; width: auto; }
.nav { display: flex; gap: 4px; margin-left: auto; align-items: center; }
.nav a {
  padding: 7px 14px; border-radius: 999px;
  color: var(--t2); font-size: 14px; white-space: nowrap;
  transition: color .15s, background .15s;
}
.nav a:hover { color: var(--t1); }
.nav a.on { color: #001018; background: var(--cyan); font-weight: 600; }
.nav a.buy {
  color: var(--cyan); border: 1px solid rgba(0, 194, 255, 0.45);
}
.nav a.buy:hover { background: rgba(0, 194, 255, 0.12); }

/* 手机端：汉堡按钮 + 抽屉 */
.nav-toggle {
  display: none; margin-left: auto;
  width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 10px;
  background: none; color: var(--t1); font-size: 18px; cursor: pointer;
}
@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .nav {
    display: none; position: absolute; left: 0; right: 0; top: 62px;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: rgba(6, 9, 14, 0.97); border-bottom: 1px solid var(--line);
    padding: 10px 16px 16px;
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 14px; border-radius: 10px; font-size: 15px; }
}

/* ── 通用元素 ──────────────────────────────────────── */
.section { padding: 64px 0; }
.section.tight { padding: 40px 0; }
h1.page-title { font-size: 30px; letter-spacing: 0.5px; }
.page-sub { color: var(--t2); margin-top: 8px; }
.kicker {
  display: inline-block; font-size: 12px; letter-spacing: 3px;
  color: var(--cyan); text-transform: uppercase; margin-bottom: 10px;
}
h2.sec-title { font-size: 24px; margin-bottom: 6px; }
.sec-sub { color: var(--t2); margin-bottom: 28px; }

.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 16px; padding: 22px;
}
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
@media (max-width: 860px) {
  .grid3, .grid2 { grid-template-columns: 1fr; }
}

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 26px; border-radius: 999px; border: none; cursor: pointer;
  font-size: 15px; font-weight: 600; transition: transform .1s, opacity .15s;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: linear-gradient(100deg, var(--cyan), #26a0ff); color: #001018; }
.btn-primary:hover { opacity: 0.9; }
.btn-ghost {
  background: none; color: var(--t1); border: 1px solid var(--line);
}
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }
.btn-purple { background: linear-gradient(100deg, var(--purple), #7a4bff); color: #fff; }
.btn[disabled] { opacity: 0.45; cursor: not-allowed; }
.btn-block { width: 100%; }

.tag {
  display: inline-block; padding: 2px 10px; border-radius: 999px;
  font-size: 12px; border: 1px solid var(--line); color: var(--t2);
}
.tag.cyan { color: var(--cyan); border-color: rgba(0, 194, 255, 0.4); }
.tag.purple { color: var(--purple); border-color: rgba(167, 110, 255, 0.4); }

.notice {
  border: 1px solid rgba(0, 194, 255, 0.35);
  background: rgba(0, 194, 255, 0.07);
  color: var(--t2); border-radius: 12px; padding: 12px 16px; font-size: 13px;
}
.notice b { color: var(--cyan); }

/* ── 表单 ─────────────────────────────────────────── */
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; color: var(--t2); margin-bottom: 6px; }
.field label .req { color: var(--danger); }
.field input[type=text], .field input[type=tel], .field input[type=number],
.field select, .field textarea {
  width: 100%; padding: 11px 14px; border-radius: 10px;
  border: 1px solid var(--line); background: #0a1017; color: var(--t1);
  font-size: 15px; font-family: inherit; outline: none;
  transition: border-color .15s;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--cyan); }
.field textarea { min-height: 110px; resize: vertical; }
.checks { display: flex; flex-wrap: wrap; gap: 10px; }
.checks label {
  display: inline-flex; align-items: center; gap: 6px; cursor: pointer;
  padding: 8px 14px; border: 1px solid var(--line); border-radius: 999px;
  color: var(--t2); font-size: 14px; margin: 0;
}
.checks input { accent-color: var(--cyan); }
.checks label.picked { border-color: var(--cyan); color: var(--cyan); }
.form-msg { margin-top: 14px; font-size: 14px; min-height: 22px; }
.form-msg.err { color: var(--danger); }
.form-msg.ok { color: var(--ok); }

/* ── 页脚 ─────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 40px; padding: 40px 0 34px;
  color: var(--t3); font-size: 13px;
}
.site-footer .cols {
  display: flex; gap: 40px; flex-wrap: wrap; margin-bottom: 26px;
}
.site-footer .col h4 { color: var(--t2); font-size: 13px; margin-bottom: 10px; font-weight: 600; }
.site-footer .col a { display: block; padding: 3px 0; color: var(--t3); }
.site-footer .col a:hover { color: var(--cyan); }
.site-footer .brandline { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.site-footer .brandline img { width: 26px; height: 26px; border-radius: 7px; }
.site-footer .icp { border-top: 1px solid var(--line); padding-top: 18px; line-height: 2; }
.site-footer .icp a { color: var(--t3); }
.site-footer .icp a:hover { color: var(--cyan); }

/* ── 首页 hero ────────────────────────────────────── */
.hero {
  position: relative; overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.hero .inner {
  display: grid; grid-template-columns: 1fr 1.05fr; gap: 40px;
  align-items: center; padding: 56px 0 64px;
}
@media (max-width: 900px) {
  .hero .inner { grid-template-columns: 1fr; padding: 36px 0 44px; }
}
.hero h1 {
  font-size: 44px; line-height: 1.25; letter-spacing: 1px;
  background: linear-gradient(100deg, #fff 30%, var(--cyan) 70%, var(--purple));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
@media (max-width: 900px) { .hero h1 { font-size: 32px; } }
.hero .lead { color: var(--t2); margin: 18px 0 28px; font-size: 16px; max-width: 480px; }
.hero .cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stage {
  position: relative; border-radius: 20px; overflow: hidden;
  border: 1px solid var(--line);
  background: #05070b;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
}
.hero-stage img { width: 100%; display: block; }
.hero-stage canvas {
  position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none;
}
.hero-fx-bar {
  display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px;
}
.hero-fx-bar button {
  padding: 6px 14px; border-radius: 999px; cursor: pointer; font-size: 13px;
  background: none; border: 1px solid var(--line); color: var(--t2);
  transition: all .15s;
}
.hero-fx-bar button.on { border-color: var(--purple); color: var(--purple); }
.hero-fx-name { font-size: 12px; color: var(--t3); margin-top: 8px; }

.feature .num { font-size: 26px; font-weight: 700; color: var(--cyan); }
.feature h3 { font-size: 17px; margin: 8px 0 6px; }
.feature p { color: var(--t2); font-size: 14px; }

/* ── 产品页 ───────────────────────────────────────── */
.price { font-size: 32px; font-weight: 700; color: var(--cyan); }
.price small { font-size: 15px; color: var(--t3); font-weight: 400; }
.spec-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.spec-table td { padding: 10px 8px; border-bottom: 1px solid var(--line); }
.spec-table td:first-child { color: var(--t3); width: 130px; }
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.gallery figure {
  border: 1px solid var(--line); border-radius: 14px; overflow: hidden;
  background: var(--card);
}
.gallery figcaption { padding: 10px 14px; font-size: 13px; color: var(--t2); }
@media (max-width: 860px) { .gallery { grid-template-columns: 1fr; } }
.fx-strip { display: grid; grid-template-columns: repeat(6, 1fr); gap: 10px; }
.fx-strip img { border-radius: 10px; border: 1px solid var(--line); }
@media (max-width: 860px) { .fx-strip { grid-template-columns: repeat(3, 1fr); } }

/* ── 课程 ─────────────────────────────────────────── */
.course-card { display: flex; flex-direction: column; gap: 10px; }
.course-card .head { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; }
.course-card h3 { font-size: 18px; }
.course-card .p { color: var(--cyan); font-weight: 700; font-size: 20px; white-space: nowrap; }
.course-card .p small { color: var(--t3); font-weight: 400; font-size: 12px; }
.course-card .desc { color: var(--t2); font-size: 14px; flex: 1; }
.course-meta { display: flex; gap: 8px; flex-wrap: wrap; }

/* ── 动态流 ───────────────────────────────────────── */
.feed { max-width: 720px; margin: 0 auto; }
.post { margin-bottom: 18px; }
.post .who { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.post .ava {
  width: 42px; height: 42px; border-radius: 50%; flex: none;
  display: flex; align-items: center; justify-content: center; font-size: 20px;
  background: linear-gradient(135deg, rgba(0,194,255,.18), rgba(167,110,255,.18));
  border: 1px solid var(--line);
}
.post .who b { font-size: 15px; }
.post .who time { display: block; font-size: 12px; color: var(--t3); }
.post .txt { white-space: pre-line; font-size: 15px; }
.post .pic { margin-top: 12px; border-radius: 12px; overflow: hidden; border: 1px solid var(--line); }
.post .foot { display: flex; gap: 22px; margin-top: 12px; color: var(--t3); font-size: 13px; }

/* ── 订单 / 支付 ──────────────────────────────────── */
.order-box { max-width: 640px; margin: 0 auto; }
.order-lines { font-size: 14px; }
.order-lines .row { display: flex; justify-content: space-between; padding: 9px 0; border-bottom: 1px solid var(--line); }
.order-lines .row span:first-child { color: var(--t3); }
.order-lines .row.total span:last-child { color: var(--cyan); font-size: 20px; font-weight: 700; }
.pay-alipay {
  width: 100%; padding: 14px; border-radius: 12px; border: none; cursor: pointer;
  background: #1677ff; color: #fff; font-size: 16px; font-weight: 600;
}
.pay-alipay[disabled] { opacity: .5; cursor: not-allowed; }
.steps { display: flex; gap: 0; counter-reset: st; margin-bottom: 30px; font-size: 13px; }
.steps span {
  flex: 1; text-align: center; color: var(--t3); position: relative; padding-top: 30px;
}
.steps span::before {
  counter-increment: st; content: counter(st);
  position: absolute; top: 0; left: 50%; transform: translateX(-50%);
  width: 24px; height: 24px; line-height: 22px; border-radius: 50%;
  border: 1px solid var(--line); background: var(--card); font-size: 12px;
}
.steps span.on { color: var(--cyan); }
.steps span.on::before { border-color: var(--cyan); color: var(--cyan); }

/* ── 协议正文 ─────────────────────────────────────── */
.legal { max-width: 780px; margin: 0 auto; }
.legal .body {
  white-space: pre-line; color: var(--t2); font-size: 14.5px; line-height: 2;
}
.legal .body::first-line { color: var(--t1); }

/* ── 关于我们 ─────────────────────────────────────── */
.about-hero { display: flex; align-items: center; gap: 26px; margin-bottom: 34px; }
.about-hero img { width: 88px; height: 88px; border-radius: 22px; }
.kv-list { font-size: 14px; }
.kv-list .row { display: flex; padding: 9px 0; border-bottom: 1px solid var(--line); }
.kv-list .row span:first-child { color: var(--t3); width: 110px; flex: none; }