:root {
  --brand: #0b6e4f;
  --brand-dark: #084c37;
  --brand-light: #12a074;
  --accent: #e8b84a;
  --ink: #14201b;
  --muted: #5a6b63;
  --line: #d7e3dc;
  --bg: #f3f7f5;
  --surface: #ffffff;
  --hero-from: #063528;
  --hero-to: #0b6e4f;
  --shadow: 0 12px 32px rgba(8, 76, 55, 0.12);
  --radius: 14px;
  --max: 1120px;
  --font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  color: var(--brand-dark);
  text-decoration: underline;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
}

.brand:hover {
  text-decoration: none;
  color: var(--brand);
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  object-fit: cover;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  transition: 0.25s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.site-nav a {
  color: var(--ink);
  padding: 0.45rem 0.7rem;
  border-radius: 8px;
  font-size: 0.95rem;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav a:hover,
.site-nav a.active {
  background: rgba(11, 110, 79, 0.1);
  color: var(--brand);
  text-decoration: none;
}

.nav-cta {
  display: flex;
  gap: 0.5rem;
  margin-left: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  transition: 0.2s ease;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand-light), var(--brand));
  color: #fff;
  box-shadow: 0 8px 18px rgba(11, 110, 79, 0.28);
}

.btn-primary:hover {
  color: #fff;
  transform: translateY(-1px);
}

.btn-secondary {
  background: #fff;
  color: var(--brand);
  border-color: rgba(11, 110, 79, 0.35);
}

.btn-secondary:hover {
  background: rgba(11, 110, 79, 0.08);
  color: var(--brand-dark);
}

.btn-accent {
  background: var(--accent);
  color: #2a2108;
}

.btn-accent:hover {
  color: #2a2108;
  filter: brightness(1.05);
}

.hero {
  position: relative;
  color: #fff;
  background:
    linear-gradient(120deg, rgba(6, 53, 40, 0.92), rgba(11, 110, 79, 0.78)),
    url("/开云体育首页.jpg") center/cover no-repeat;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 90px;
  background: linear-gradient(to top, var(--bg), transparent);
}

.hero-inner {
  position: relative;
  z-index: 1;
  padding: 4.5rem 0 5rem;
  display: grid;
  gap: 1.5rem;
  max-width: 720px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.25;
  letter-spacing: 0.02em;
}

.hero p {
  margin: 0;
  font-size: 1.08rem;
  color: rgba(255, 255, 255, 0.92);
  max-width: 38rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  font-size: 0.92rem;
  color: rgba(255, 255, 255, 0.88);
}

.section {
  padding: 3.2rem 0;
}

.section-head {
  margin-bottom: 1.6rem;
}

.section-head h2 {
  margin: 0 0 0.55rem;
  font-size: clamp(1.45rem, 3vw, 1.9rem);
  color: var(--ink);
}

.section-head p {
  margin: 0;
  color: var(--muted);
  max-width: 46rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.5rem;
  align-items: start;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.35rem;
  box-shadow: var(--shadow);
}

.panel h3 {
  margin: 0 0 0.65rem;
  font-size: 1.15rem;
}

.feature-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.85rem;
}

.feature-list li {
  padding-left: 1.4rem;
  position: relative;
  color: var(--muted);
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--brand-light);
}

.media-frame {
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #081b14;
  box-shadow: var(--shadow);
}

.media-frame img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.steps {
  counter-reset: step;
  display: grid;
  gap: 1rem;
}

.step {
  position: relative;
  padding: 1.2rem 1.2rem 1.2rem 4rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 1rem;
  top: 1.15rem;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
}

.step h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}

.step p {
  margin: 0;
  color: var(--muted);
}

.partner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.85rem;
}

.partner-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.85rem;
  display: grid;
  place-items: center;
  min-height: 88px;
}

.partner-item img {
  max-height: 56px;
  width: auto;
  object-fit: contain;
}

.shot-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.shot-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.shot-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.shot-card p {
  margin: 0;
  padding: 0.85rem 1rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.prose {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem 1.4rem;
}

.prose h2,
.prose h3 {
  color: var(--ink);
  scroll-margin-top: 90px;
}

.prose h2 {
  margin-top: 1.8rem;
  margin-bottom: 0.7rem;
  font-size: 1.35rem;
  border-left: 4px solid var(--brand);
  padding-left: 0.7rem;
}

.prose h2:first-child {
  margin-top: 0;
}

.prose h3 {
  margin-top: 1.3rem;
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.prose p,
.prose li {
  color: #33463d;
}

.prose ul,
.prose ol {
  padding-left: 1.2rem;
}

.faq details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.95rem 1.1rem;
  margin-bottom: 0.75rem;
}

.faq summary {
  cursor: pointer;
  font-weight: 650;
  color: var(--ink);
}

.faq p {
  margin: 0.7rem 0 0;
  color: var(--muted);
}

.cta-band {
  background: linear-gradient(135deg, var(--hero-from), var(--hero-to));
  color: #fff;
  border-radius: calc(var(--radius) + 4px);
  padding: 2rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow);
}

.cta-band h2 {
  margin: 0 0 0.55rem;
}

.cta-band p {
  margin: 0 auto 1.2rem;
  max-width: 40rem;
  color: rgba(255, 255, 255, 0.9);
}

.page-hero {
  padding: 2.6rem 0 1.4rem;
  background:
    radial-gradient(circle at top right, rgba(18, 160, 116, 0.18), transparent 45%),
    linear-gradient(180deg, #e8f4ef, var(--bg));
}

.page-hero h1 {
  margin: 0 0 0.55rem;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}

.page-hero p {
  margin: 0;
  color: var(--muted);
  max-width: 46rem;
}

.breadcrumb {
  margin-bottom: 0.85rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.breadcrumb a {
  color: var(--brand);
}

.auth-layout {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 1.4rem;
  align-items: start;
}

.auth-form {
  display: grid;
  gap: 0.9rem;
}

.form-group {
  display: grid;
  gap: 0.35rem;
}

.form-group label {
  font-weight: 600;
  font-size: 0.92rem;
}

.form-group input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.8rem 0.9rem;
  font: inherit;
  background: #fff;
}

.form-group input:focus {
  outline: 2px solid rgba(11, 110, 79, 0.25);
  border-color: var(--brand);
}

.form-note {
  font-size: 0.9rem;
  color: var(--muted);
}

.error-page {
  min-height: 70vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 3rem 1rem;
}

.error-page .code {
  font-size: clamp(3.5rem, 10vw, 6rem);
  font-weight: 800;
  color: var(--brand);
  line-height: 1;
  margin: 0 0 0.5rem;
}

.site-footer {
  margin-top: 2rem;
  background: #0b1f18;
  color: rgba(255, 255, 255, 0.86);
  padding: 2.5rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 1.5rem;
}

.site-footer h3 {
  margin: 0 0 0.8rem;
  color: #fff;
  font-size: 1rem;
}

.site-footer p,
.site-footer a {
  color: rgba(255, 255, 255, 0.78);
}

.site-footer a:hover {
  color: #fff;
}

.footer-links {
  display: grid;
  gap: 0.45rem;
}

.footer-bottom {
  margin-top: 1.8rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.65);
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.2rem;
  justify-content: space-between;
}

.toc {
  background: #edf7f2;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1.1rem;
  margin-bottom: 1.2rem;
}

.toc strong {
  display: block;
  margin-bottom: 0.45rem;
}

.toc a {
  display: inline-block;
  margin-right: 0.85rem;
  margin-bottom: 0.35rem;
}

@media (max-width: 960px) {
  .grid-2,
  .auth-layout,
  .footer-grid,
  .shot-grid {
    grid-template-columns: 1fr;
  }

  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 72px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 0.85rem 1rem 1rem;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
  }

  .site-nav.open {
    display: flex;
  }

  .nav-cta {
    margin-left: 0;
    margin-top: 0.35rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .site-nav a {
    padding: 0.75rem 0.85rem;
  }
}

@media (max-width: 640px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    padding: 3.2rem 0 4rem;
  }

  .section {
    padding: 2.4rem 0;
  }
}

/* Top ads strip */
.ads-bar {
  position: relative;
  z-index: 900;
  background: #fff;
  border-bottom: 1px solid var(--line);
  padding: 0.65rem 0 0.35rem;
}

#ads {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 0.35rem 0.55rem;
  background: transparent;
  margin: 0;
  min-height: 0;
}

#ads > div {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 70px;
  box-sizing: border-box;
}

#ads figure {
  margin: 0;
}

#ads img {
  width: 65px;
  height: 65px;
  object-fit: cover;
  border-radius: 18px;
  box-shadow: 0 6px 18px rgba(24, 24, 24, 0.12);
  transition: transform 180ms ease, box-shadow 180ms ease;
  display: block;
  border: none;
  background: linear-gradient(135deg, #fff, #fff);
  max-width: none;
}

#ads a {
  display: inline-block;
  text-decoration: none;
  border-radius: 15px;
}

#ads a:hover {
  text-decoration: none;
}

#ads img:hover {
  transform: translateY(-4px) scale(1.04);
  box-shadow: 0 10px 24px rgba(24, 24, 24, 0.18);
}

#ads figcaption,
#ads .caption {
  height: 15px;
  font-size: 11px;
  color: #666;
  text-align: center;
  max-width: 100px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-top: 4px;
}