/* ============================================================
   神队友电竞 · 官网样式
   设计基调：深海军蓝舞台 + 品牌橙能量 + 电竞科技感
   ============================================================ */

:root {
  --bg: #060a13;
  --bg-2: #0a1220;
  --bg-3: #0d1729;
  --panel: rgba(255, 255, 255, .045);
  --panel-2: rgba(255, 255, 255, .08);
  --line: rgba(255, 255, 255, .09);
  --line-strong: rgba(255, 255, 255, .18);
  --accent: #ff6a00;
  --accent-2: #ffa03d;
  --blue: #2f6bff;
  --text: #eef3fc;
  --muted: #93a1bb;
  --radius: 20px;
  --shadow: 0 24px 70px rgba(0, 0, 0, .45);
  --ease: cubic-bezier(.22, .61, .36, 1);
  --header-h: 74px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
}

::selection {
  background: rgba(255, 106, 0, .38);
  color: #fff;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: -60px;
  left: 16px;
  z-index: 200;
  padding: 12px 20px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  border-radius: 10px;
  transition: top .3s var(--ease);
}

.skip-link:focus {
  top: 12px;
}

/* ================= 顶部导航 ================= */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background .35s var(--ease), border-color .35s var(--ease), box-shadow .35s var(--ease);
}

.site-header.is-scrolled {
  background: rgba(6, 10, 19, .82);
  border-bottom-color: var(--line);
  box-shadow: 0 10px 40px rgba(0, 0, 0, .35);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: rgba(255, 255, 255, .05);
  border: 1px solid var(--line);
  flex: none;
  overflow: hidden;
}

.brand-logo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.brand-logo-text {
  height: 46px;
  width: auto;
  flex: none;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-text strong {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: .05em;
}

.brand-text small {
  margin-top: 2px;
  font-size: 8.5px;
  letter-spacing: .26em;
  color: var(--muted);
  font-weight: 600;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  position: relative;
  padding: 9px 16px;
  font-size: 15px;
  color: var(--muted);
  font-weight: 600;
  border-radius: 10px;
  transition: color .25s;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s var(--ease);
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--text);
}

.nav-link:hover::after,
.nav-link.is-active::after {
  transform: scaleX(1);
}

.nav-cta {
  margin-left: 10px;
  padding: 10px 22px;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  color: #fff;
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(255, 106, 0, .28);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}

.nav-cta::after {
  display: none;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 32px rgba(255, 106, 0, .45);
}

.nav-toggle {
  display: none;
  position: relative;
  z-index: 120;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 46px;
  height: 46px;
  padding: 0 12px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  cursor: pointer;
}

.nav-toggle .bar {
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: transform .3s var(--ease), opacity .3s var(--ease);
}

.nav-toggle[aria-expanded="true"] .bar:nth-child(2) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .bar:nth-child(3) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .bar:nth-child(4) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ================= 按钮 ================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 12px;
  border: 1px solid transparent;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .02em;
  cursor: pointer;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), background .3s var(--ease), border-color .3s var(--ease);
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  color: #fff;
  box-shadow: 0 12px 32px rgba(255, 106, 0, .35);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 42px rgba(255, 106, 0, .5);
}

.btn-ghost {
  background: rgba(255, 255, 255, .05);
  border-color: var(--line-strong);
  color: var(--text);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, .1);
  border-color: var(--accent);
  transform: translateY(-2px);
}

/* ================= 首页主视觉 ================= */

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  padding: calc(var(--header-h) + 44px) 0 44px;
}

.hero-media {
  position: absolute;
  inset: -14% 0 0 0;
  z-index: -3;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(1200px 520px at 18% 100%, rgba(255, 106, 0, .2), transparent 62%),
    linear-gradient(180deg, rgba(6, 10, 19, .58) 0%, rgba(6, 10, 19, .22) 42%, rgba(6, 10, 19, .84) 78%, var(--bg) 100%);
}

.hero-grid {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .035) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(180deg, transparent, rgba(0, 0, 0, .55) 38%, transparent 94%);
  mask-image: linear-gradient(180deg, transparent, rgba(0, 0, 0, .55) 38%, transparent 94%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 840px;
  margin-bottom: 54px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  letter-spacing: .3em;
  color: var(--accent-2);
  font-weight: 700;
}

.eyebrow::before {
  content: "";
  width: 34px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  flex: none;
}

.hero-title {
  margin: 22px 0 20px;
  font-size: clamp(38px, 6.4vw, 72px);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: .01em;
}

.hero-title .line {
  display: block;
  white-space: nowrap;
}

.hero-title .line-accent {
  background: linear-gradient(90deg, #ffc37a, var(--accent) 58%, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  max-width: 640px;
  font-size: clamp(15px, 1.6vw, 18px);
  color: var(--muted);
  margin-bottom: 34px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-stats {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(9, 14, 26, .55);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  overflow: hidden;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 22px 26px;
}

.hero-stat + .hero-stat {
  border-left: 1px solid var(--line);
}

.hero-stat strong {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 900;
  line-height: 1.2;
  color: #ffb35c;
}

.hero-stat strong [data-count] {
  font-size: 1em;
}

.hero-stat > span {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: .06em;
}

.scroll-hint {
  position: absolute;
  right: 34px;
  bottom: 26px;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: .22em;
}

.mouse {
  position: relative;
  width: 24px;
  height: 38px;
  border: 1.5px solid var(--line-strong);
  border-radius: 12px;
}

.mouse::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 7px;
  width: 4px;
  height: 8px;
  margin-left: -2px;
  border-radius: 4px;
  background: var(--accent);
  animation: wheel 1.8s infinite;
}

@keyframes wheel {
  0% { opacity: 0; transform: translateY(0); }
  30% { opacity: 1; }
  100% { opacity: 0; transform: translateY(10px); }
}

/* ================= 跑马灯 ================= */

.ticker {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg-2);
  overflow: hidden;
  padding: 15px 0;
}

.ticker-track {
  display: flex;
  align-items: center;
  width: max-content;
  white-space: nowrap;
  animation: ticker 36s linear infinite;
}

.ticker-track span {
  font-size: 14px;
  color: var(--muted);
  letter-spacing: .18em;
  font-weight: 600;
  padding: 0 18px;
}

.ticker-track i {
  width: 6px;
  height: 6px;
  background: var(--accent);
  transform: rotate(45deg);
  opacity: .75;
  flex: none;
}

@keyframes ticker {
  to { transform: translateX(-50%); }
}

/* ================= 通用板块 ================= */

.section {
  position: relative;
  padding: clamp(72px, 9vw, 120px) 0;
}

.section + .section {
  border-top: 1px solid var(--line);
}

section[id] {
  scroll-margin-top: calc(var(--header-h) + 12px);
}

.about {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
}

.join {
  background:
    radial-gradient(900px 500px at 85% 8%, rgba(47, 107, 255, .13), transparent 62%),
    var(--bg);
}

.plan {
  background: linear-gradient(180deg, var(--bg-2), var(--bg));
}

.contact {
  background:
    radial-gradient(900px 520px at 8% 92%, rgba(255, 106, 0, .11), transparent 62%),
    var(--bg);
}

.section-head {
  max-width: 740px;
  margin-bottom: clamp(40px, 6vw, 64px);
}

.section-title {
  margin-top: 18px;
  font-size: clamp(28px, 4.4vw, 46px);
  line-height: 1.18;
  font-weight: 900;
  letter-spacing: .01em;
}

.section-desc {
  margin-top: 16px;
  max-width: 620px;
  color: var(--muted);
  font-size: 16px;
}

/* ================= 关于我们 ================= */

.about-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
  margin-top: clamp(36px, 5vw, 56px);
}

.about-grid-reverse {
  margin-top: clamp(48px, 7vw, 80px);
}

.about-figure {
  position: relative;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background: var(--bg-3);
}

.about-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(6, 10, 19, .55));
  pointer-events: none;
}

.about-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .8s var(--ease);
}

.about-figure:hover .reveal-clip img {
  transform: scale(1.04);
}

.reveal-clip {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.reveal-clip img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-copy p {
  color: var(--muted);
  font-size: 15.5px;
  margin-bottom: 16px;
}

.about-copy p.lead {
  color: var(--text);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.6;
}

.timeline-title {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 28px;
}

.timeline-list {
  position: relative;
  padding-left: 26px;
}

.timeline-list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), rgba(47, 107, 255, .4));
}

.timeline-list li {
  position: relative;
  padding: 0 0 30px 22px;
}

.timeline-list li:last-child {
  padding-bottom: 0;
}

.timeline-list li::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 7px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 5px rgba(255, 106, 0, .12);
}

.year {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 6px;
  margin-bottom: 9px;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .08em;
  color: #fff;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
}

.timeline-list p {
  color: var(--muted);
  font-size: 15px;
}

/* ================= 加入我们 ================= */

.join-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: clamp(36px, 5vw, 56px);
}

.join-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
}

.join-card:hover {
  transform: translateY(-8px);
  border-color: rgba(255, 106, 0, .55);
  box-shadow: 0 30px 60px rgba(0, 0, 0, .45);
}

.join-card-media {
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

.join-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .7s var(--ease);
}

.join-card:hover .join-card-media img {
  transform: scale(1.06);
}

.join-card-body {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 26px 26px 28px;
}

.join-index {
  position: absolute;
  top: 2px;
  right: 22px;
  font-size: 58px;
  font-weight: 900;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, .14);
  pointer-events: none;
}

.join-card h3 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 12px;
}

.join-card > .join-card-body > p {
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.75;
  margin-bottom: 16px;
}

.join-card ul {
  margin-bottom: 22px;
}

.join-card ul li {
  position: relative;
  padding: 6px 0 6px 20px;
  color: var(--muted);
  font-size: 14px;
}

.join-card ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 13px;
  width: 9px;
  height: 2px;
  background: var(--accent);
}

.link-more {
  margin-top: auto;
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease), color .25s var(--ease);
}

.link-more span {
  color: var(--accent);
  transition: transform .3s var(--ease);
}

.link-more:hover {
  border-color: var(--accent);
}

.link-more:hover span {
  transform: translateX(5px);
}

.more-business {
  margin-top: 48px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 30px;
  background: rgba(47, 107, 255, .05);
}

.more-business-head h3 {
  font-size: 19px;
  font-weight: 800;
  margin-bottom: 8px;
}

.more-business-head p {
  font-size: 14px;
  color: var(--muted);
  max-width: 760px;
}

.more-business-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 22px;
}

.biz-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  overflow: hidden;
}

.biz-card summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  list-style: none;
  transition: background .25s var(--ease), border-color .25s var(--ease);
}

.biz-card summary::-webkit-details-marker {
  display: none;
}

.biz-card summary:hover {
  background: rgba(255, 106, 0, .08);
}

.biz-plus {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
}

.biz-plus::before,
.biz-plus::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--accent);
  transform: translate(-50%, -50%);
}

.biz-plus::before {
  width: 14px;
  height: 2px;
}

.biz-plus::after {
  width: 2px;
  height: 14px;
  transition: transform .25s var(--ease);
}

.biz-card[open] .biz-plus::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.biz-body {
  padding: 2px 18px 18px;
}

.biz-body p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ================= 光创计划 ================= */

.plan-banner {
  position: relative;
  aspect-ratio: 21 / 9;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  margin-bottom: clamp(36px, 5vw, 56px);
}

.plan-banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.plan-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}

.plan-copy p {
  color: var(--muted);
  margin-bottom: 16px;
}

.plan-copy p.lead {
  color: var(--text);
  font-weight: 700;
  font-size: 18px;
}

.plan-copy code {
  padding: 2px 6px;
  border-radius: 5px;
  background: rgba(255, 255, 255, .08);
  color: var(--accent-2);
  font-size: .9em;
}

.plan-copy .btn {
  margin-top: 10px;
}

/* ================= 商务合作 ================= */

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: clamp(36px, 5vw, 56px);
}

.contact-card {
  position: relative;
  border: 1px solid rgba(255, 106, 0, .4);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(255, 106, 0, .14), var(--panel) 60%);
  padding: 30px;
  transition: border-color .35s var(--ease), transform .35s var(--ease);
}

.contact-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-4px);
}

.contact-icon {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  margin-bottom: 18px;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  color: #fff;
  font-size: 15px;
  font-weight: 900;
  box-shadow: 0 8px 20px rgba(255, 106, 0, .3);
}

.contact-card h3 {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 10px;
}

.contact-card > p {
  color: var(--muted);
  font-size: 14.5px;
  margin-bottom: 20px;
}

.contact-list li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  font-size: 14.5px;
}

.contact-list li span {
  color: var(--muted);
}

.contact-list li em {
  font-style: normal;
  color: var(--text);
  font-weight: 600;
}

.contact-steps {
  counter-reset: step;
}

.contact-steps li {
  counter-increment: step;
  position: relative;
  padding: 10px 0 10px 40px;
  color: var(--muted);
  font-size: 14.5px;
  border-top: 1px solid var(--line);
}

.contact-steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 10px;
  font-weight: 900;
  color: var(--accent);
  font-size: 15px;
}

.contact-card .btn {
  width: 100%;
  margin-top: 6px;
}

/* ================= 页脚 ================= */

.site-footer {
  border-top: 1px solid var(--line);
  background: #04070e;
  padding: 44px 0 38px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  flex-wrap: wrap;
}

.brand-footer .brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 11px;
}

.brand-footer .brand-logo-text {
  height: 36px;
}

.footer-nav {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

.footer-nav a {
  color: var(--muted);
  font-size: 14px;
  transition: color .25s;
}

.footer-nav a:hover {
  color: var(--text);
}

.footer-meta {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.9;
  text-align: right;
}

.footer-meta em {
  font-style: normal;
  color: var(--accent-2);
}

/* ================= 回到顶部 ================= */

.back-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 90;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  background: rgba(10, 18, 32, .85);
  color: var(--text);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity .3s var(--ease), transform .3s var(--ease), visibility .3s, background .3s var(--ease);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.back-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.back-top:hover {
  background: var(--accent);
  border-color: var(--accent);
}

/* ================= 动效（JS 启用时生效） ================= */

html.js [data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .85s var(--ease), transform .85s var(--ease);
}

html.js [data-reveal][data-reveal-delay="1"] {
  transition-delay: .12s;
}

html.js [data-reveal][data-reveal-delay="2"] {
  transition-delay: .24s;
}

html.js [data-reveal][data-reveal-delay="3"] {
  transition-delay: .36s;
}

html.js [data-reveal].is-in,
html.js [data-reveal-group].is-in [data-reveal-item],
html.js [data-reveal-item].is-in {
  opacity: 1;
  transform: none;
}

html.js [data-reveal-item] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .85s var(--ease), transform .85s var(--ease);
}

html.js [data-image-reveal] .reveal-clip {
  clip-path: inset(0 0 100% 0);
  transition: clip-path 1.1s var(--ease);
}

html.js [data-image-reveal] .reveal-clip img {
  transform: scale(1.08);
  transition: transform 1.2s var(--ease);
}

html.js [data-image-reveal].is-in .reveal-clip {
  clip-path: inset(0 0 0 0);
}

html.js [data-image-reveal].is-in .reveal-clip img {
  transform: scale(1);
}

html.js [data-hero-line] {
  opacity: 0;
  transform: translateY(44px);
  transition: opacity .95s var(--ease), transform .95s var(--ease);
}

html.js [data-hero-line]:nth-child(2) {
  transition-delay: .18s;
}

html.js body.is-loaded [data-hero-line] {
  opacity: 1;
  transform: none;
}

/* ================= 无障碍：减少动态效果 ================= */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

  html.js [data-reveal],
  html.js [data-reveal-item],
  html.js [data-hero-line] {
    opacity: 1 !important;
    transform: none !important;
    clip-path: none !important;
    transition: none !important;
  }

  html.js [data-image-reveal] .reveal-clip,
  html.js [data-image-reveal] .reveal-clip img {
    clip-path: none !important;
    transform: none !important;
    transition: none !important;
  }

  .mouse::after,
  .ticker-track {
    animation: none;
  }
}

/* ================= 响应式 ================= */

@media (max-width: 980px) {
  .join-cards,
  .contact-grid {
    grid-template-columns: 1fr;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
  }

  .about-grid,
  .about-grid-reverse,
  .plan-grid {
    grid-template-columns: 1fr;
  }

  .about-grid-reverse .about-figure {
    order: -1;
  }

  .hero-stats {
    grid-template-columns: 1fr 1fr;
  }

  .hero-stat:nth-child(3) {
    border-left: 0;
  }

  .hero-stat:nth-child(n+3) {
    border-top: 1px solid var(--line);
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-meta {
    text-align: left;
  }

  .scroll-hint {
    display: none;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 86vw);
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: calc(var(--header-h) + 18px) 22px 30px;
    background: rgba(7, 11, 20, .96);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    border-left: 1px solid var(--line);
    box-shadow: -20px 0 60px rgba(0, 0, 0, .5);
    transform: translateX(105%);
    transition: transform .4s var(--ease);
  }

  .site-nav.is-open {
    transform: none;
  }

  .nav-link {
    font-size: 17px;
    padding: 14px 16px;
  }

  .nav-link::after {
    display: none;
  }

  .nav-link:hover {
    background: var(--panel);
  }

  .nav-cta {
    margin: 14px 0 0;
    text-align: center;
  }

  .hero {
    padding-bottom: 34px;
  }

  .hero-title {
    font-size: clamp(30px, 8.4vw, 44px);
  }

  .hero-stat {
    padding: 16px 18px;
  }

  .more-business-grid {
    grid-template-columns: 1fr;
  }

  .more-business {
    padding: 22px;
  }

  .back-top {
    right: 18px;
    bottom: 18px;
  }

  .ticker-track span {
    padding: 0 14px;
    font-size: 13px;
  }
}

@media (max-width: 420px) {
  .hero-actions .btn {
    width: 100%;
  }

  .hero-stat strong {
    font-size: 22px;
  }
}