/* =========================================================
   51每日大赛 - 单页面样式
   ========================================================= */

:root {
  --brand: #1e40af;
  --brand-2: #f59e0b;
  --brand-soft: #eef2ff;
  --ink: #0c1424;
  --ink-2: #2a3448;
  --muted: #64748b;
  --line: rgba(12, 20, 36, .08);
  --soft: #f8fafc;
  --dark: #0a1020;
  --radius: 18px;
  --shadow-sm: 0 6px 18px rgba(12, 20, 36, .05);
  --shadow: 0 14px 40px rgba(12, 20, 36, .09);
  --header-h: 72px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font: 16px/1.75 system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: #fff;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }
em { font-style: normal; }

h1, h2, h3, h4 {
  margin: 0 0 .5em;
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -.02em;
}
h1 { font-size: clamp(34px, 5vw, 58px); }
h2 { font-size: clamp(26px, 3.4vw, 40px); }
h3 { font-size: 19px; }
h4 { font-size: 16px; }

.wrap {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.sec {
  padding: 92px 0;
  scroll-margin-top: calc(var(--header-h) + 12px);
}
.sec-soft { background: var(--soft); }

/* 顶部导航 */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1000;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: box-shadow .25s, border-color .25s, background .25s;
}
.header.scrolled {
  background: rgba(255, 255, 255, .97);
  border-bottom-color: var(--line);
  box-shadow: 0 8px 30px rgba(12, 20, 36, .07);
}
.header-in {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-mark {
  width: 38px; height: 38px;
  border-radius: 12px;
  display: grid; place-items: center;
  color: #fff; font-weight: 900; font-size: 15px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: 0 8px 20px rgba(30, 64, 175, .35);
}
.logo-text {
  display: flex; flex-direction: column;
  line-height: 1.1; font-weight: 900; font-size: 17px;
}
.logo-text small {
  font-size: 11px; font-weight: 500;
  color: var(--muted); margin-top: 3px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav a {
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 14px;
  color: var(--ink-2);
  white-space: nowrap;
  transition: background .2s, color .2s;
}
.nav a:hover { background: var(--brand-soft); color: var(--brand); }
.nav-cta {
  margin-left: 8px;
  padding: 9px 18px !important;
  color: #fff !important;
  font-weight: 700;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: 0 8px 20px rgba(30, 64, 175, .28);
}

.burger {
  display: none;
  width: 42px; height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.burger span {
  display: block;
  width: 18px; height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform .25s, opacity .25s;
}
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 首屏 */
.hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 76px) 0 100px;
  color: #fff;
  background:
    radial-gradient(880px 520px at 8% 0%, rgba(30, 64, 175, .55), transparent 62%),
    radial-gradient(760px 520px at 94% 16%, rgba(245, 158, 11, .42), transparent 64%),
    radial-gradient(700px 500px at 50% 118%, rgba(96, 165, 250, .28), transparent 70%),
    linear-gradient(180deg, #0a1020, #101c33 58%, #152640);
}
.hero-in {
  position: relative;
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  gap: 56px;
  align-items: center;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, .2);
  background: rgba(255, 255, 255, .08);
  color: rgba(255, 255, 255, .9);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 22px;
}
.hero h1 {
  color: #fff;
  margin-bottom: 18px;
  text-shadow: 0 2px 30px rgba(0, 0, 0, .35);
}
.hero h1 em {
  background: linear-gradient(135deg, #fbbf24, #f59e0b 45%, #93c5fd);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  max-width: 580px;
  font-size: 17px;
  color: rgba(255, 255, 255, .82);
  margin-bottom: 28px;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: transform .2s, box-shadow .2s, background .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-main {
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: 0 12px 30px rgba(30, 64, 175, .34);
}
.btn-line {
  color: #fff;
  background: rgba(255, 255, 255, .08);
  border-color: rgba(255, 255, 255, .28);
}
.btn-line:hover { background: rgba(255, 255, 255, .16); }
.btn-block { width: 100%; }

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  max-width: 620px;
}
.stats li {
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .13);
}
.stats b {
  display: block;
  font-size: 24px;
  line-height: 1;
  color: #fbbf24;
  margin-bottom: 6px;
}
.stats span {
  font-size: 12px;
  color: rgba(255, 255, 255, .68);
}

.hero-bands {
  display: flex;
  flex-direction: column;
  gap: 14px;
  transform: rotate(-5deg);
}
.band {
  padding: 18px 22px;
  border-radius: 14px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .04em;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, .18);
  box-shadow: 0 20px 50px rgba(0, 0, 0, .38);
  position: relative;
  overflow: hidden;
}
.band::after {
  content: "";
  position: absolute;
  right: -30px; top: -30px;
  width: 90px; height: 90px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .16);
}
.b1 { background: linear-gradient(120deg, #1e3a8a, #2563eb); width: 92%; }
.b2 { background: linear-gradient(120deg, #b45309, #f59e0b); width: 92%; margin-left: 8%; }
.b3 { background: linear-gradient(120deg, #1e40af, #3b82f6); width: 92%; margin-left: 2%; }
.b4 { background: linear-gradient(120deg, #92400e, #fbbf24); width: 92%; margin-left: 10%; }
.b5 { background: linear-gradient(120deg, #1e3a8a, #60a5fa); width: 92%; margin-left: 4%; }

/* 标题块 */
.sec-head {
  max-width: 820px;
  margin: 0 auto 52px;
  text-align: center;
}
.tag {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--brand);
  background: var(--brand-soft);
  margin-bottom: 16px;
}
.sec-head h2 { margin-bottom: 14px; }
.sec-head h2 em {
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.sec-head p {
  color: var(--muted);
  font-size: 16px;
  margin: 0;
}

/* 网格与卡片 */
.grid { display: grid; gap: 22px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }
.mt { margin-top: 22px; }

.card {
  padding: 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(30, 64, 175, .28);
}
.card h3 { margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 15px; }

/* 关于我们 */
.about {
  display: grid;
  grid-template-columns: 1fr 330px;
  gap: 34px;
  align-items: start;
}
.about-main h3 { margin-top: 28px; }
.about-main h3:first-child { margin-top: 0; }
.about-main p { color: var(--muted); }
.about-side { display: grid; gap: 16px; }

.mini {
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.mini-num {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 900;
  color: var(--brand);
  background: var(--brand-soft);
  margin-bottom: 12px;
}
.mini h4 { margin-bottom: 6px; }
.mini p { color: var(--muted); font-size: 14px; margin: 0; }

.ticks { display: grid; gap: 10px; margin-top: 12px; }
.ticks li {
  position: relative;
  padding-left: 26px;
  color: var(--muted);
  font-size: 15px;
}
.ticks li::before {
  content: "✓";
  position: absolute;
  left: 0; top: 0;
  color: var(--brand);
  font-weight: 900;
}

/* 优势卡片 */
.feat .ico {
  display: inline-grid;
  place-items: center;
  width: 48px; height: 48px;
  border-radius: 14px;
  font-size: 22px;
  background: linear-gradient(135deg, var(--brand-soft), #fef3d6);
  margin-bottom: 16px;
}

/* 服务专区 */
.zone-card { display: flex; flex-direction: column; }
.thumb {
  height: 132px;
  border-radius: 14px;
  margin-bottom: 18px;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 26px;
  font-weight: 900;
  letter-spacing: .08em;
  box-shadow: inset 0 -30px 60px rgba(0, 0, 0, .2);
}
.t-kr { background: linear-gradient(135deg, #1e3a8a, #2563eb); }
.t-cn { background: linear-gradient(135deg, #b45309, #f59e0b); }
.t-jp { background: linear-gradient(135deg, #1e40af, #3b82f6); }
.t-eu { background: linear-gradient(135deg, #92400e, #fbbf24); }
.t-strip { background: linear-gradient(135deg, #1e3a8a, #60a5fa); }
.t-nav { background: linear-gradient(135deg, #1e293b, #475569); }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.chips li {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  color: var(--brand);
  background: var(--brand-soft);
}
.chips-lg li {
  background: #fff;
  border: 1px solid var(--line);
  color: var(--ink-2);
}

.scene { font-size: 14px; color: var(--muted); margin: 0; }

/* 热门服务 */
.hot-card { position: relative; }
.hot-badge {
  position: absolute;
  top: 18px; right: 18px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 900;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
}
.reason { font-size: 14px; color: var(--muted); }

/* 数据展示 */
.data {
  padding: 26px 20px;
  text-align: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.data b {
  display: block;
  font-size: 34px;
  line-height: 1;
  color: var(--brand);
  margin: 12px 0 8px;
}
.data span:last-child { font-size: 13px; color: var(--muted); }

.flag {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 800;
  color: #92400e;
  background: #fef3c7;
  border: 1px solid #fde68a;
}
.flag-case {
  color: #1e3a8a;
  background: #eef2ff;
  border-color: #c7d2fe;
}

.note {
  max-width: 900px;
  margin: 24px auto 0;
  padding: 18px 20px;
  border-radius: 14px;
  font-size: 14px;
  background: #fffbeb;
  border: 1px solid #fde68a;
  color: #92400e;
}

/* 时间轴 */
.timeline {
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  gap: 6px;
}
.timeline li {
  position: relative;
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 18px;
  padding-bottom: 26px;
}
.timeline li::before {
  content: "";
  position: absolute;
  left: 16px; top: 18px; bottom: -6px;
  width: 2px;
  background: linear-gradient(180deg, rgba(30, 64, 175, .5), rgba(245, 158, 11, .15));
}
.timeline li:last-child::before { display: none; }

.dot {
  width: 16px; height: 16px;
  margin: 4px auto 0;
  border-radius: 50%;
  background: #fff;
  border: 4px solid var(--brand);
  box-shadow: 0 0 0 5px rgba(30, 64, 175, .12);
}
.timeline > li > div {
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.tl-tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 800;
  color: var(--brand);
  background: var(--brand-soft);
  margin-bottom: 10px;
}
.timeline h3 { margin-bottom: 8px; }
.timeline p { color: var(--muted); font-size: 15px; margin: 0; }

/* 占位 */
.ph {
  padding: 30px 18px;
  text-align: center;
  font-size: 14px;
  color: var(--muted);
  background: #fff;
  border: 1px dashed rgba(12, 20, 36, .18);
  border-radius: var(--radius);
}
.ph span { display: block; font-size: 26px; margin-bottom: 10px; }

/* 新闻 */
.news {
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.news:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(30, 64, 175, .28);
}
.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 12px;
}
.cat {
  padding: 4px 9px;
  border-radius: 999px;
  font-weight: 800;
  color: var(--brand);
  background: var(--brand-soft);
}
.news-meta time { color: var(--muted); }
.news h3 {
  font-size: 17px;
  line-height: 1.45;
  margin-bottom: 10px;
}
.news p {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 14px;
}
.news-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.news-tags span {
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 11px;
  color: var(--muted);
  background: #eef2f7;
}

/* 流程 */
.steps li {
  padding: 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.step-num {
  display: inline-block;
  font-size: 26px;
  font-weight: 900;
  line-height: 1;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 14px;
}
.steps h3 { margin-bottom: 8px; }
.steps p { color: var(--muted); font-size: 15px; margin: 0; }

/* 口碑 */
.quote {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.quote p { color: var(--ink-2); font-size: 15px; }
.quote footer {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
}
.avatar {
  width: 34px; height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  flex-shrink: 0;
}
.quote cite {
  font-size: 13px;
  color: var(--muted);
  font-style: normal;
}

/* 品牌故事 */
.story {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 34px;
  align-items: start;
}
.story-main h3 { margin-top: 26px; }
.story-main h3:first-child { margin-top: 0; }
.story-main p { color: var(--muted); }
.story-side { display: grid; gap: 16px; }
.story-side h4 { margin-bottom: 14px; }

/* FAQ */
.faq {
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  gap: 12px;
}
.faq details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.faq summary {
  padding: 18px 52px 18px 22px;
  position: relative;
  cursor: pointer;
  font-weight: 700;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 20px; top: 50%;
  transform: translateY(-50%);
  width: 24px; height: 24px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-weight: 900;
  color: var(--brand);
  background: var(--brand-soft);
  transition: transform .2s;
}
.faq details[open] summary::after {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
}
.faq-body {
  padding: 0 22px 20px;
  color: var(--muted);
  font-size: 15px;
}

/* 在线留言 */
.contact {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 28px;
  align-items: start;
}

.form {
  padding: 30px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 26px;
  box-shadow: var(--shadow);
}
.row { margin-bottom: 18px; }
.row label {
  display: block;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
}
.row input,
.row select,
.row textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid rgba(12, 20, 36, .16);
  border-radius: 12px;
  background: #fff;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}
.row textarea { resize: vertical; min-height: 120px; }
.row input:focus,
.row select:focus,
.row textarea:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(30, 64, 175, .12);
}

.check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 20px;
}
.check input { margin-top: 4px; accent-color: var(--brand); }

.tip {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 12px;
  font-size: 14px;
}
.tip.err { color: #b91c1c; background: #fef2f2; border: 1px solid #fecaca; }
.tip.ok { color: #047857; background: #ecfdf5; border: 1px solid #a7f3d0; }

.form-note {
  margin-top: 14px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
}

.info {
  padding: 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 26px;
  box-shadow: var(--shadow-sm);
}
.info h3 { margin-bottom: 18px; }
.info li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}
.info li:last-of-type { border-bottom: none; }
.info span { color: var(--muted); flex-shrink: 0; }
.info b, .info a {
  text-align: right;
  font-weight: 600;
  color: var(--ink-2);
  word-break: break-word;
}
.pending { color: #b45309 !important; }

/* SEO 文章 */
.article {
  max-width: 900px;
  margin: 0 auto;
  padding: 38px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 26px;
  box-shadow: var(--shadow-sm);
}
.article p { color: var(--ink-2); font-size: 16px; }

/* 快速导航 */
.quicknav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.quicknav a {
  display: block;
  padding: 14px 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  text-align: center;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-2);
  transition: transform .2s, border-color .2s, color .2s, box-shadow .2s;
}
.quicknav a:hover {
  transform: translateY(-3px);
  border-color: rgba(30, 64, 175, .35);
  color: var(--brand);
  box-shadow: var(--shadow-sm);
}

/* 页脚 */
.footer {
  margin-top: 20px;
  padding: 70px 0 28px;
  background: var(--dark);
  color: rgba(255, 255, 255, .72);
}
.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 46px;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}
.logo-footer .logo-text { color: #fff; }
.logo-footer .logo-text small { color: rgba(255, 255, 255, .55); }
.footer-brand p {
  margin: 18px 0;
  font-size: 14px;
  color: rgba(255, 255, 255, .62);
  max-width: 420px;
}

.footer-col h3 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 16px;
}
.footer-col ul { display: grid; gap: 10px; }
.footer-col a {
  font-size: 14px;
  color: rgba(255, 255, 255, .66);
  transition: color .2s;
}
.footer-col a:hover { color: #fff; }

.footer-contact li {
  display: flex;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, .66);
}
.footer-contact span { color: rgba(255, 255, 255, .42); flex-shrink: 0; }
.footer-contact .pending { color: #fbbf24 !important; }

.footer-bottom {
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.footer-bottom p {
  margin: 0;
  font-size: 13px;
  color: rgba(255, 255, 255, .48);
}
.footer-bottom ul { display: flex; gap: 18px; }
.footer-bottom a {
  font-size: 13px;
  color: rgba(255, 255, 255, .56);
}
.footer-bottom a:hover { color: #fff; }

/* 响应式 */
@media (max-width: 1100px) {
  .g4 { grid-template-columns: repeat(2, 1fr); }
  .quicknav { grid-template-columns: repeat(3, 1fr); }
  .footer-top { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-top .footer-col:last-child { grid-column: 1 / -1; }
}

@media (max-width: 980px) {
  :root { --header-h: 64px; }
  .wrap { padding: 0 20px; }

  .burger { display: flex; }
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 14px 20px 22px;
    background: rgba(255, 255, 255, .98);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 20px 40px rgba(12, 20, 36, .1);
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }
  .nav.open { display: flex; }
  .nav a {
    padding: 12px 14px;
    border-radius: 12px;
    font-size: 15px;
  }
  .nav-cta { margin: 6px 0 0 !important; text-align: center; }

  .hero { padding: calc(var(--header-h) + 54px) 0 78px; }
  .hero-in { grid-template-columns: 1fr; gap: 44px; }
  .hero-bands { transform: rotate(-4deg); max-width: 420px; }

  .sec { padding: 72px 0; }
  .g3, .g2 { grid-template-columns: repeat(2, 1fr); }

  .about, .story, .contact { grid-template-columns: 1fr; }
  .about-side, .story-side { grid-template-columns: repeat(2, 1fr); }

  .footer-top {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
  .footer-top .footer-col:last-child { grid-column: auto; }

  .article { padding: 28px; }
}

@media (max-width: 640px) {
  body { font-size: 15px; }
  .wrap { padding: 0 16px; }

  .logo-text { font-size: 15px; }
  .logo-mark { width: 34px; height: 34px; border-radius: 10px; font-size: 13px; }

  .hero { padding: calc(var(--header-h) + 42px) 0 62px; }
  .hero h1 { font-size: 31px; }
  .hero-sub { font-size: 15px; }
  .btn-row { flex-direction: column; }
  .btn-row .btn { width: 100%; }
  .stats { grid-template-columns: 1fr; }
  .hero-bands { transform: rotate(-3deg); gap: 10px; }
  .band {
    padding: 13px 16px;
    font-size: 13px;
    border-radius: 12px;
  }

  .sec { padding: 58px 0; }
  .sec-head { margin-bottom: 34px; }
  .sec-head h2 { font-size: 26px; }
  .sec-head p { font-size: 14px; }

  .g2, .g3, .g4, .quicknav,
  .about-side, .story-side {
    grid-template-columns: 1fr;
  }

  .card, .news, .steps li,
  .timeline > li > div, .mini,
  .form, .info, .article {
    padding: 22px;
    border-radius: 16px;
  }

  .quicknav { grid-template-columns: repeat(2, 1fr); }

  .footer-top { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .footer-bottom ul { flex-wrap: wrap; gap: 12px; }

  .timeline li { grid-template-columns: 28px 1fr; gap: 12px; }
  .timeline li::before { left: 13px; }
  .dot { width: 14px; height: 14px; border-width: 3px; }

  .faq summary { padding: 16px 46px 16px 18px; font-size: 15px; }
  .faq-body { padding: 0 18px 18px; font-size: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
  .hero-bands { transform: none; }
}