/* ==========================================================
   海南网娱科技 官网样式
   主色 #4A6CF7（沿用参考稿），支持深色模式（html.dark）
   ========================================================== */
:root {
  --primary: #4A6CF7;
  --primary-dark: #3a58d8;
  --accent: #8b5cf6;
  --bg: #ffffff;
  --bg-alt: #f5f7ff;
  --card: #ffffff;
  --text: #1d2144;
  --muted: #5f6b85;
  --border: #e6e9f4;
  --shadow: 0 10px 40px rgba(74, 108, 247, .10);
  --radius: 16px;
  --header-h: 76px;
}
html.dark {
  --bg: #111722;
  --bg-alt: #161d2b;
  --card: #1c2433;
  --text: #f1f4ff;
  --muted: #9aa5bf;
  --border: #2c3443;
  --shadow: 0 10px 40px rgba(0, 0, 0, .35);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  transition: background .3s, color .3s;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; line-height: 1.25; }
p { margin: 0; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 22px; border-radius: 10px; font-weight: 600; font-size: 15px;
  border: 1px solid transparent; cursor: pointer; transition: all .25s; white-space: nowrap;
  font-family: inherit;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 24px rgba(74,108,247,.35); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); }
.btn-ghost { border-color: var(--border); color: var(--text); background: transparent; }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn-lg { padding: 14px 28px; font-size: 16px; }
.btn-block { width: 100%; }
.btn-play { color: var(--text); padding-left: 0; }
.btn-play:hover { color: var(--primary); }
.play-icon {
  width: 46px; height: 46px; border-radius: 50%; display: grid; place-items: center;
  background: var(--card); color: var(--primary); box-shadow: var(--shadow); font-size: 14px;
  position: relative;
}
.play-icon::after {
  content: ""; position: absolute; inset: -6px; border-radius: 50%;
  border: 2px solid rgba(74,108,247,.35); animation: pulse 2s infinite;
}
@keyframes pulse { 0% { transform: scale(.9); opacity: 1; } 100% { transform: scale(1.35); opacity: 0; } }

/* ---------- Header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100; height: var(--header-h);
  display: flex; align-items: center; transition: background .3s, box-shadow .3s;
}
.site-header.scrolled {
  background: var(--bg); /* 或半透明 rgba 背景 */
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  /* 注释或移除 backdrop-filter */
  /* backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); */
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; }
.brand-mark {
  width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--accent)); font-size: 18px;
}
.brand-text { display: flex; flex-direction: column; font-size: 28px; line-height: 1.1; }

.main-nav { display: flex; align-items: center; gap: 28px; flex: 1; justify-content: flex-end; }
.nav-list { list-style: none; display: flex; gap: 30px; margin: 0; padding: 0; }
.nav-link { font-weight: 500; font-size: 15px; color: var(--muted); padding: 24px 0; display: inline-flex; align-items: center; gap: 6px; transition: color .2s; }
.nav-link i { font-size: 10px; }
.nav-link:hover, .nav-link.active { color: var(--primary); }
.has-submenu { position: relative; }
.submenu {
  list-style: none; margin: 0; padding: 10px; position: absolute; top: 100%; left: -16px; min-width: 210px;
  background: var(--card); border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow);
  opacity: 0; visibility: hidden; transform: translateY(10px); transition: all .25s;
}
.has-submenu:hover .submenu, .has-submenu:focus-within .submenu { opacity: 1; visibility: visible; transform: translateY(0); }
.submenu a { display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 8px; font-size: 14px; color: var(--muted); }
.submenu a i { width: 18px; color: var(--primary); }
.submenu a:hover { background: var(--bg-alt); color: var(--primary); }
.nav-actions { display: flex; gap: 10px; }

.header-tools { display: flex; align-items: center; gap: 8px; }
.icon-btn {
  width: 42px; height: 42px; border-radius: 50%; border: 1px solid var(--border); background: var(--card);
  color: var(--text); cursor: pointer; display: grid; place-items: center; font-size: 16px; transition: all .2s;
}
.icon-btn:hover { color: var(--primary); border-color: var(--primary); }
.icon-sun { display: none; }
html.dark .icon-sun { display: inline; }
html.dark .icon-moon { display: none; }
.menu-toggle { display: none; }

/* ---------- Hero ---------- */
.hero-section { position: relative; padding: calc(var(--header-h) + 80px) 0 110px; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; z-index: -1; pointer-events: none; }

.blob { 
  position: absolute; 
  border-radius: 50%; 
  filter: blur(60px); /* 半径从 110px 降至 60px，视觉差异很小但计算量减半 */
  opacity: .45;
  transform: translateZ(0); /* 强制提升到独立合成层，避免滚动时引起重绘 */
  will-change: transform;
  pointer-events: none;
}
.blob-1 { width: 520px; height: 520px; background: #abbcff; top: -160px; right: -80px; }
.blob-2 { width: 420px; height: 420px; background: var(--primary); bottom: -200px; left: -120px; opacity: .25; }
html.dark .blob-1 { opacity: .22; }
.grid-overlay {
  position: absolute; inset: 0;
  background-image: linear-gradient(var(--border) 1px, transparent 1px), linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px; opacity: .45;
  mask-image: radial-gradient(ellipse at 60% 30%, #000 10%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 60% 30%, #000 10%, transparent 70%);
}
.hero-inner { display: grid; grid-template-columns: 1.05fr 1fr; gap: 60px; align-items: center; }
.pill {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 16px; border-radius: 999px;
  background: rgba(74,108,247,.1); color: var(--primary); font-weight: 600; font-size: 14px; margin-bottom: 22px;
}
.pill-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--primary); }
.hero-title { font-size: clamp(36px, 5.2vw, 60px); font-weight: 900; letter-spacing: -.01em; margin-bottom: 22px; }
.gradient-text {
  background: linear-gradient(90deg, var(--primary), var(--accent)); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.gradient-text::after { content: "|"; color: var(--primary); -webkit-text-fill-color: var(--primary); animation: blink 1s steps(1) infinite; margin-left: 2px; font-weight: 400; }
@keyframes blink { 50% { opacity: 0; } }
.hero-desc { font-size: 17px; color: var(--muted); max-width: 520px; margin-bottom: 34px; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 26px; margin-bottom: 44px; }
.hero-stats { list-style: none; padding: 0; margin: 0; display: flex; gap: 40px; flex-wrap: wrap; }
.hero-stats li { display: flex; flex-direction: column; }
.hero-stats strong { font-size: 32px; font-weight: 800; color: var(--text); }
.hero-stats span { font-size: 14px; color: var(--muted); }

.hero-visual { position: relative; height: 520px; }
.visual-main {
  position: absolute; top: 0; right: 0; width: 82%; height: 78%; margin: 0; border-radius: 24px; overflow: hidden; box-shadow: var(--shadow);
}
.visual-main img, .visual-sub img { width: 100%; height: 100%; object-fit: cover; }
.live-badge {
  position: absolute; left: 16px; top: 16px; background: rgba(17,23,34,.72); color: #fff; font-size: 13px; font-weight: 600;
  padding: 6px 14px; border-radius: 999px; display: flex; align-items: center; gap: 8px; backdrop-filter: blur(6px);
}
.live-dot { width: 8px; height: 8px; border-radius: 50%; background: #ff3b5c; animation: blink 1.2s infinite; }
.visual-sub {
  position: absolute; left: 0; bottom: 0; width: 48%; height: 44%; margin: 0; border-radius: 20px; overflow: hidden;
  border: 6px solid var(--bg); box-shadow: var(--shadow);
}
.float-card {
  position: absolute; display: flex; align-items: center; gap: 12px; background: var(--card); padding: 12px 16px; border-radius: 14px;
  box-shadow: var(--shadow); border: 1px solid var(--border); animation: float 5s ease-in-out infinite;will-change: transform;
  transform: translateZ(0);
}
.float-card i { width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center; background: rgba(74,108,247,.12); color: var(--primary); }
.float-card strong { display: block; font-size: 15px; }
.float-card span { font-size: 12px; color: var(--muted); }
.float-card-1 { right: -10px; bottom: 60px; }
.float-card-2 { left: 4%; top: 32%; animation-delay: -2.5s; }
.float-card-2 i { background: rgba(16,185,129,.12); color: #10b981; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
.wave-deco { position: absolute; right: 12%; bottom: -10px; fill: none; stroke: var(--primary); stroke-width: 2; }

/* ---------- Sections ---------- */
.section { padding: 110px 0; }
.section-tight { padding: 70px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 64px; }
.eyebrow { display: inline-block; font-size: 13px; letter-spacing: .25em; font-weight: 700; color: var(--primary); margin-bottom: 12px; }
.section-title { font-size: clamp(30px, 4vw, 44px); font-weight: 800; margin-bottom: 16px; }
.section-title.left { text-align: left; }
.section-desc { color: var(--muted); font-size: 16px; }

/* 业务卡片 */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 36px 30px;
  transition: transform .3s, box-shadow .3s, border-color .3s; position: relative; overflow: hidden;
}
.feature-card::before {
  content: ""; position: absolute; left: 0; top: 0; height: 3px; width: 0; background: linear-gradient(90deg, var(--primary), var(--accent)); transition: width .4s;
}
.feature-card:hover, .feature-card.highlight { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.feature-card:hover::before, .feature-card.highlight::before { width: 100%; }
.feature-icon {
  width: 68px; height: 68px; border-radius: 16px; display: grid; place-items: center; font-size: 28px; margin-bottom: 24px;
  background: rgba(74,108,247,.1); color: var(--primary); transition: all .3s;
}
.feature-card:hover .feature-icon { background: var(--primary); color: #fff; }
.feature-card h3 { font-size: 21px; margin-bottom: 10px; }
.feature-card p { color: var(--muted); font-size: 15px; margin-bottom: 18px; }
.feature-link { font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; gap: 6px; align-items: center; }
.feature-link i { transition: transform .2s; }
.feature-link:hover i { transform: translateX(4px); }

/* 关于 */
.about-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center; }
.about-media { position: relative; }
.about-media img { border-radius: 24px; box-shadow: var(--shadow); aspect-ratio: 4/3; object-fit: cover; width: 100%; }
.about-badge {
  position: absolute; right: -20px; bottom: -28px; background: var(--primary); color: #fff; padding: 20px 26px; border-radius: 18px;
  display: flex; align-items: center; gap: 14px; box-shadow: 0 16px 40px rgba(74,108,247,.4);
}
.about-badge strong { font-size: 36px; font-weight: 900; }
.about-badge span { font-size: 13px; line-height: 1.4; opacity: .9; }
.tab-buttons { display: flex; gap: 8px; background: var(--card); border: 1px solid var(--border); padding: 6px; border-radius: 12px; margin: 26px 0; flex-wrap: wrap; }
.tab-btn {
  flex: 1; border: 0; background: transparent; padding: 10px 14px; border-radius: 8px; cursor: pointer; font-weight: 600;
  color: var(--muted); font-family: inherit; font-size: 15px; transition: all .2s;
}
.tab-btn.active { background: var(--primary); color: #fff; }
.tab-panel { display: none; color: var(--muted); animation: fadeIn .4s; }
.tab-panel.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.check-list { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 10px; }
.check-list li { display: flex; gap: 10px; align-items: center; color: var(--text); font-weight: 500; }
.check-list i { color: var(--primary); }
.step-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 16px; }
.step-list li { display: flex; gap: 16px; align-items: flex-start; }
.step-list span { font-weight: 800; color: var(--primary); font-size: 20px; min-width: 36px; }
.step-list strong { display: block; color: var(--text); }

/* 案例 */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.case-card { background: var(--card); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); transition: all .3s; }
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.case-thumb { position: relative; aspect-ratio: 16/10; overflow: hidden; }
.case-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.case-card:hover .case-thumb img { transform: scale(1.06); }
.case-tag { position: absolute; top: 16px; right: 16px; background: var(--primary); color: #fff; font-size: 13px; font-weight: 600; padding: 4px 14px; border-radius: 999px; }
.case-body { padding: 24px 26px 28px; }
.case-meta { display: flex; gap: 18px; font-size: 13px; color: var(--muted); margin-bottom: 10px; }
.case-meta i { margin-right: 6px; }
.case-body h3 { font-size: 19px; margin-bottom: 10px; }
.case-body p:last-child { color: var(--muted); font-size: 14px; }

/* 合作伙伴 */
.partners-title { text-align: center; font-size: 26px; font-weight: 800; margin-bottom: 36px; }
.partner-track { overflow: hidden; mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); }
.partner-row { display: flex; gap: 60px; width: max-content; animation: marquee 28s linear infinite; }
.partner-track:hover .partner-row { animation-play-state: paused; will-change: transform; transform: translateZ(0);}
.partner-logo { display: inline-flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 700; color: var(--muted); opacity: .7; transition: all .2s; white-space: nowrap; }
.partner-logo i { font-size: 28px; }
.partner-logo:hover { color: var(--primary); opacity: 1; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* 技术支持 */
.support-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-bottom: 56px; }
.support-item { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px 24px; text-align: center; }
.support-item i { font-size: 30px; color: var(--primary); margin-bottom: 16px; }
.support-item h3 { font-size: 18px; margin-bottom: 8px; }
.support-item p { color: var(--muted); font-size: 14px; }
.faq { margin: 0 0 14px; background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 0 24px; }
.faq summary { cursor: pointer; padding: 18px 0; font-weight: 600; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 22px; color: var(--primary); transition: transform .2s; }
.faq[open] summary::after { transform: rotate(45deg); }
.faq p { color: var(--muted); padding-bottom: 18px; }

/* 联系 */
.contact-section { background: linear-gradient(135deg, #1d2144 0%, #2b3a8f 55%, var(--primary) 100%); color: #fff; }
.contact-inner { display: grid; grid-template-columns: 1fr 1.1fr; gap: 60px; align-items: start; }
.eyebrow.light { color: #c7d2ff; }
.contact-info h2 { font-size: clamp(30px, 4vw, 44px); font-weight: 800; margin-bottom: 16px; }
.contact-info > p { color: #d7ddff; margin-bottom: 28px; }
.contact-list { list-style: none; padding: 0; margin: 0 0 32px; display: grid; gap: 14px; }
.contact-list li { display: flex; align-items: center; gap: 14px; }
.contact-list i { width: 40px; height: 40px; border-radius: 10px; background: rgba(255,255,255,.12); display: grid; place-items: center; }
.join-box { background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.15); border-radius: 14px; padding: 20px 22px; scroll-margin-top: calc(var(--header-h) + 20px); }
.join-box h3 { font-size: 18px; margin-bottom: 6px; }
.join-box p { color: #d7ddff; font-size: 14px; }
.contact-form { background: var(--card); color: var(--text); border-radius: 20px; padding: 34px; box-shadow: 0 20px 60px rgba(0,0,0,.25); display: grid; gap: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.contact-form label { display: grid; gap: 6px; font-size: 14px; font-weight: 600; }
.contact-form input, .contact-form select, .contact-form textarea {
  width: 100%; font: inherit; font-weight: 400; font-size: 15px; padding: 11px 14px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text); transition: border-color .2s, box-shadow .2s; resize: vertical;
}
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(74,108,247,.18); }
.contact-form .invalid { border-color: #ef4444; }
.form-status { font-size: 14px; min-height: 20px; text-align: center; }
.form-status.ok { color: #10b981; }
.form-status.err { color: #ef4444; }

/* Footer */
.site-footer { padding: 40px 0; border-top: 1px solid var(--border); }
.footer-inner { display: flex; align-items: center; justify-content: center; text-align: center; gap: 20px; flex-wrap: wrap; }
.footer-links { display: flex; gap: 24px; }
.footer-links a, .copyright { color: var(--muted); font-size: 14px; }
.footer-links a:hover, .copyright a:hover { color: var(--primary); }

.back-to-top {
  position: fixed; right: 24px; bottom: 24px; width: 46px; height: 46px; border-radius: 12px; background: var(--primary); color: #fff;
  display: grid; place-items: center; box-shadow: 0 8px 24px rgba(74,108,247,.4); opacity: 0; visibility: hidden; transform: translateY(10px); transition: all .3s; z-index: 90;
}
.back-to-top.show { opacity: 1; visibility: visible; transform: none; }

/* 滚动出现动画 */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
.delay-1 { transition-delay: .1s; } .delay-2 { transition-delay: .2s; } .delay-3 { transition-delay: .3s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .partner-row, .float-card { animation: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .nav-list { gap: 20px; }
  .nav-actions .btn-ghost { display: none; }
}
@media (max-width: 960px) {
  .menu-toggle { display: grid; }
  .main-nav {
    position: fixed; top: var(--header-h); left: 12px; right: 12px; flex-direction: column; align-items: stretch; gap: 16px;
    background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 16px; box-shadow: var(--shadow);
    opacity: 0; visibility: hidden; transform: translateY(-10px); transition: all .25s; max-height: calc(100vh - var(--header-h) - 24px); overflow-y: auto;
  }
  .main-nav.open { opacity: 1; visibility: visible; transform: none; }
  .nav-list { flex-direction: column; gap: 0; }
  .nav-link { padding: 12px 8px; width: 100%; }
  .submenu { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: 0; padding: 0 0 0 12px; background: transparent; }
  .nav-actions { flex-direction: column; }
  .nav-actions .btn-ghost { display: inline-flex; }
  .site-header { background: color-mix(in srgb, var(--bg) 90%, transparent); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }

  .hero-inner, .about-inner, .contact-inner { grid-template-columns: 1fr; }
  .hero-section { padding-top: calc(var(--header-h) + 50px); padding-bottom: 80px; }
  .hero-visual { height: 440px; max-width: 600px; }
  .feature-grid, .case-grid { grid-template-columns: repeat(2, 1fr); }
  .support-grid { grid-template-columns: repeat(2, 1fr); }
  .about-badge { right: 12px; }
  .section { padding: 80px 0; }
}
@media (max-width: 600px) {
  .brand-text small { display: none; }
  .hero-visual { height: 340px; }
  .float-card { padding: 8px 12px; }
  .float-card i { width: 32px; height: 32px; }
  .float-card-1 { right: 0; bottom: 30px; }
  .hero-stats { gap: 24px; }
  .hero-stats strong { font-size: 26px; }
  .feature-grid, .case-grid, .support-grid, .form-row { grid-template-columns: 1fr; }
  .contact-form { padding: 24px 20px; }
  .footer-inner { flex-direction: column; text-align: center; }
  .section-head { margin-bottom: 44px; }
}