/* ============================================================
   StartRide 分官网 · 驾驶舱级工程美学 v4
   ============================================================ */
:root {
  --bg: #07090b;
  --bg-2: #0a0d11;
  --bg-3: #0d1117;
  --card: #0e1218;
  --border: #141b24;
  --border-2: #1e2836;
  --text: #f0f3f7;
  --muted: #8b94a3;
  --dim: #566070;
  --accent: #3d8bff;
  --accent-2: #6fb1ff;
  --accent-dim: rgba(61, 139, 255, 0.10);
  --grid-line: rgba(148, 163, 184, 0.05);
  --font: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", "Cascadia Code", Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* ===== 全局精密网格背景 ===== */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 120% 80% at 50% 0%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 120% 80% at 50% 0%, #000 40%, transparent 100%);
  pointer-events: none;
  z-index: 0;
}

/* 噪点 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  opacity: 0.03;
  pointer-events: none;
  z-index: 0;
}

/* 顶部滚动进度 */
.scroll-progress {
  position: fixed;
  top: 0; left: 0; height: 2px; width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  z-index: 100;
  box-shadow: 0 0 14px rgba(61,139,255,0.55);
}

a { color: inherit; text-decoration: none; }
img { display: block; }
::selection { background: rgba(61,139,255,0.30); color: #fff; }

.container { max-width: 1420px; margin: 0 auto; padding: 0 44px; position: relative; z-index: 1; }

/* ===== 导航 ===== */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(7, 9, 11, 0.72);
  backdrop-filter: blur(28px) saturate(180%);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  border-bottom: 1px solid rgba(20, 27, 36, 0.6);
  transition: background 0.5s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand img {
  width: 46px; height: 46px;
  object-fit: contain;
  background: #ffffff;
  border-radius: 12px;
  padding: 6px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(255, 255, 255, 0.1);
}
.brand-name { font-size: 17.5px; font-weight: 750; letter-spacing: 0.5px; }
.brand-name small { display: block; font-size: 9px; font-weight: 500; color: var(--dim); letter-spacing: 3px; margin-top: 2px; }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a {
  font-size: 13px; color: var(--muted);
  letter-spacing: 0.3px;
  transition: color 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  padding: 4px 0;
}
.nav-links a::after {
  content: "";
  position: absolute; left: 0; bottom: 0;
  width: 0; height: 1.5px;
  background: var(--accent);
  transition: width 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { width: 100%; }
.nav-cta { display: flex; align-items: center; gap: 14px; }

.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 10px 22px; border-radius: 6px;
  font-size: 13.5px; font-weight: 650;
  border: 1px solid transparent; cursor: pointer;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative; overflow: hidden;
}
.btn-accent {
  background: linear-gradient(135deg, #6db3ff 0%, #3d8bff 40%, #1d4ed8 100%);
  color: #ffffff;
  box-shadow: 0 8px 28px rgba(37,99,235,0.45), inset 0 1px 0 rgba(255,255,255,0.35), inset 0 -1px 0 rgba(0,0,0,0.15);
  position: relative;
  overflow: hidden;
}
.btn-accent::before {
  content: "";
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
  transition: left 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.btn-accent:hover::before { left: 100%; }
.btn-accent:hover {
  background: linear-gradient(135deg, #85c1ff 0%, #4d97ff 40%, #2563eb 100%);
  transform: translateY(-2px);
  box-shadow: 0 16px 44px rgba(37,99,235,0.55), inset 0 1px 0 rgba(255,255,255,0.45), inset 0 -1px 0 rgba(0,0,0,0.1);
}
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border-2); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-2); transform: translateY(-1px); }
.btn .arr { transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1); display: inline-block; }
.btn:hover .arr { transform: translateX(4px); }

/* ===== Hero：全屏沉浸 ===== */
.hero {
  min-height: 92vh;
  display: flex; align-items: center;
  padding: 90px 0 70px;
  position: relative;
  overflow: hidden;
}
/* 动态光带 */
.hero::before {
  content: "";
  position: absolute;
  width: 900px; height: 620px;
  top: -120px; left: -180px;
  background: radial-gradient(closest-side, rgba(61,139,255,0.10), transparent 70%);
  filter: blur(20px);
  animation: drift1 16s ease-in-out infinite alternate;
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  width: 760px; height: 560px;
  bottom: -160px; right: -120px;
  background: radial-gradient(closest-side, rgba(45,150,255,0.07), transparent 70%);
  filter: blur(24px);
  animation: drift2 20s ease-in-out infinite alternate;
  pointer-events: none;
}
@keyframes drift1 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, 40px) scale(1.08); }
  100% { transform: translate(-30px, 80px) scale(0.95); }
}
@keyframes drift2 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-50px, -40px) scale(1.1); }
  100% { transform: translate(40px, -70px) scale(0.96); }
}

/* Hero 左侧刻度标签 */
.hero .tag {
  display: inline-flex; align-items: center; gap: 14px;
  font-family: var(--mono);
  font-size: 12px; font-weight: 600; letter-spacing: 3px;
  color: var(--accent-2); text-transform: uppercase;
  margin-bottom: 34px;
}
.hero .tag::before {
  content: "";
  width: 44px; height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
}
.hero .tag .tag-no { color: var(--dim); }
.hero h1 {
  font-size: clamp(52px, 7.6vw, 88px);
  font-weight: 800; letter-spacing: -2px;
  line-height: 1.06; margin-bottom: 30px;
  max-width: 860px;
}
.hero h1 .line { display: block; }
.hero h1 .line-2 { margin-top: 8px; }
.hero h1 .grad {
  background: linear-gradient(115deg, #ffffff 0%, #e8f2ff 18%, #9ccfff 42%, #5aa8ff 65%, #2563eb 88%, #1d4ed8 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 4px 28px rgba(37,99,235,0.45));
}
.hero .sub {
  font-size: 17px; color: var(--muted);
  max-width: 600px; margin-bottom: 46px; line-height: 1.9;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* Hero 满版装饰：刻度尺 + 幽灵 SR + 参数条 */
.hero-deco { position: absolute; right: 0; top: 0; bottom: 0; width: 220px; pointer-events: none; z-index: 0; }
.hd-scale {
  position: absolute; right: 44px; top: 15%; bottom: 16%;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(61,139,255,0.32) 18%, rgba(61,139,255,0.32) 82%, transparent);
}
.hd-scale i { position: absolute; right: 0; width: 10px; height: 1px; background: rgba(61,139,255,0.4); }
.hd-scale i:nth-child(1) { top: 0%; }
.hd-scale i:nth-child(2) { top: 25%; width: 6px; }
.hd-scale i:nth-child(3) { top: 50%; width: 14px; background: rgba(61,139,255,0.55); }
.hd-scale i:nth-child(4) { top: 75%; width: 6px; }
.hd-scale i:nth-child(5) { top: 100%; }
.hd-meta {
  position: absolute; right: 58px; bottom: 30px;
  font-family: var(--mono); font-size: 10px; letter-spacing: 3px;
  color: var(--dim); writing-mode: vertical-rl; text-transform: uppercase;
}
.hd-ghost {
  position: absolute; right: 2px; bottom: 24px;
  font-size: clamp(150px, 20vw, 280px); font-weight: 900; line-height: 0.8;
  letter-spacing: -8px;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(61,139,255,0.12);
  text-stroke: 1.5px rgba(61,139,255,0.12);
  user-select: none;
}
@media (max-width: 900px) {
  .hero-deco { display: none; }
}

/* Hero 入场 */
.anim { opacity: 0; transform: translateY(26px); animation: rise 1s cubic-bezier(0.2, 0.6, 0.2, 1) forwards; }
.anim.d1 { animation-delay: 0.05s; }
.anim.d2 { animation-delay: 0.16s; }
.anim.d3 { animation-delay: 0.28s; }
.anim.d4 { animation-delay: 0.42s; }
@keyframes rise { to { opacity: 1; transform: none; } }

/* ===== 终端仪表 ===== */
.demo {
  margin-top: 84px;
  border: 1px solid var(--border-2);
  border-radius: 12px;
  background:
    linear-gradient(180deg, rgba(13, 17, 23, 0.92), rgba(7, 9, 11, 0.96));
  overflow: hidden;
  box-shadow:
    0 50px 120px rgba(0,0,0,0.6),
    inset 0 1px 0 rgba(255,255,255,0.03);
  opacity: 0; transform: translateY(30px);
}
.demo.visible { animation: rise 1.1s cubic-bezier(0.2, 0.6, 0.2, 1) 0.1s forwards; }
.demo-bar {
  display: flex; align-items: center; gap: 7px;
  padding: 13px 18px;
  background: rgba(10, 13, 17, 0.9);
  border-bottom: 1px solid var(--border);
}
.demo-bar .dot { width: 10px; height: 10px; border-radius: 50%; }
.demo-bar .dot.r { background: #ff5f57; }
.demo-bar .dot.y { background: #febc2e; }
.demo-bar .dot.g { background: #28c840; }
.demo-bar .title {
  margin-left: 14px;
  font-size: 11.5px; color: var(--dim);
  font-family: var(--mono); letter-spacing: 1px;
}
.demo-bar .status {
  margin-left: auto;
  font-size: 10px; color: var(--accent-2);
  font-family: var(--mono); letter-spacing: 1.5px;
  display: flex; align-items: center; gap: 6px;
}
.demo-bar .status::before {
  content: "";
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse { 50% { opacity: 0.35; } }
.demo-body {
  padding: 30px 34px 32px;
  font-family: var(--mono); font-size: 13px; line-height: 2.25;
  color: #bcc4d0;
}
.demo-body .ln { display: flex; gap: 18px; opacity: 0; }
.demo-body .ln.show { animation: lnIn 0.45s ease forwards; }
@keyframes lnIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.demo-body .ln .no { color: #242e3a; width: 22px; text-align: right; flex-shrink: 0; user-select: none; }
.demo-body .cm { color: #4a5563; }
.demo-body .ok { color: var(--accent-2); }
.demo-body .cmd { color: #e2e8f0; }
.demo-body .em { color: #7dd3fc; }
.demo-body .dim { color: #45505e; }
.demo-body .cursor {
  display: inline-block; width: 8px; height: 15px;
  background: var(--accent);
  vertical-align: -2px;
  animation: blink 1s steps(2, start) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ===== 区块系统 ===== */
.section {
  padding: 120px 0;
  border-top: 1px solid var(--border);
  position: relative;
}
/* 区块左上角幽灵大编号 */
.section .ghost-no {
  position: absolute;
  top: 26px; left: 24px;
  font-family: var(--mono);
  font-size: 150px; font-weight: 800;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(61, 139, 255, 0.09);
  pointer-events: none;
  user-select: none;
  z-index: 0;
}
.section-label {
  display: flex; align-items: center; gap: 14px;
  font-size: 11px; font-weight: 700; letter-spacing: 3.5px;
  color: var(--accent-2); text-transform: uppercase;
  margin-bottom: 22px;
  font-family: var(--mono);
}
.section-label::before {
  content: "";
  width: 26px; height: 1px;
  background: var(--accent);
}
.section h2 {
  font-size: clamp(34px, 4.4vw, 50px);
  font-weight: 800; letter-spacing: -1px;
  line-height: 1.16; margin-bottom: 20px;
  max-width: 760px;
}
.section .lead { color: var(--muted); font-size: 15.5px; max-width: 580px; line-height: 1.9; }

/* ===== 功能：行式大列表 ===== */
.func-list { margin-top: 64px; }
.func-row {
  display: grid;
  grid-template-columns: 96px 200px 1fr 44px;
  align-items: center;
  gap: 28px;
  padding: 30px 24px;
  border-top: 1px solid var(--border);
  transition: background 0.45s cubic-bezier(0.16, 1, 0.3, 1), padding-left 0.45s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  cursor: default;
}
.func-row:last-child { border-bottom: 1px solid var(--border); }
.func-row::before {
  content: "";
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: center;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.func-row:hover { background: rgba(13, 17, 23, 0.6); padding-left: 32px; }
.func-row:hover::before { transform: scaleY(1); }
.func-row .f-no {
  font-family: var(--mono);
  font-size: 40px; font-weight: 800;
  color: transparent;
  -webkit-text-stroke: 1px rgba(139, 148, 163, 0.35);
  line-height: 1;
  transition: -webkit-text-stroke-color 0.4s cubic-bezier(0.16, 1, 0.3, 1), color 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.func-row:hover .f-no {
  -webkit-text-stroke-color: transparent;
  color: var(--accent);
}
.func-row .f-name { font-size: 19px; font-weight: 700; letter-spacing: 0.2px; }
.func-row .f-name small {
  display: block;
  font-size: 10px; font-weight: 600; color: var(--dim);
  letter-spacing: 2.5px; margin-top: 3px;
  font-family: var(--mono); text-transform: uppercase;
}
.func-row .f-desc { color: var(--muted); font-size: 14px; line-height: 1.85; max-width: 560px; }
.func-row .f-arrow {
  font-size: 20px; color: var(--dim);
  transition: color 0.35s cubic-bezier(0.16, 1, 0.3, 1), transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  text-align: right;
}
.func-row:hover .f-arrow { color: var(--accent); transform: translateX(5px); }

/* ===== 支持标签 ===== */
.support-row {
  margin-top: 64px;
  display: flex; align-items: flex-start; gap: 26px; flex-wrap: wrap;
  padding: 32px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.support-row .sp-title {
  font-size: 11px; font-weight: 700; letter-spacing: 2.5px;
  color: var(--dim); text-transform: uppercase;
  font-family: var(--mono);
  padding-top: 8px;
  flex-shrink: 0;
}
.support-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  padding: 8px 16px; border-radius: 5px;
  border: 1px solid var(--border-2);
  background: rgba(10, 13, 17, 0.7);
  font-size: 13px; color: var(--muted);
  display: inline-flex; align-items: center; gap: 8px;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.chip:hover { color: var(--text); border-color: rgba(61,139,255,0.5); background: var(--accent-dim); }
.chip .c-dot { width: 5px; height: 5px; border-radius: 50%; background: var(--accent); }

/* ===== 教程 ===== */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin-top: 64px; }
.step {
  padding: 0 36px;
  border-left: 1px solid var(--border);
  transition: background 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}
.step:first-child { border-left: none; padding-left: 0; }
.step .s-no {
  font-family: var(--mono);
  font-size: 58px; font-weight: 800;
  background: linear-gradient(180deg, #7cc4ff 0%, #3d8bff 40%, #1d4ed8 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1; margin-bottom: 24px;
  filter: drop-shadow(0 2px 12px rgba(37,99,235,0.3));
}
.step h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.step p { font-size: 13.5px; color: var(--muted); line-height: 1.9; }
.step .s-code {
  margin-top: 20px;
  font-family: var(--mono); font-size: 12px;
  color: var(--accent-2);
  padding: 11px 15px;
  background: rgba(10, 13, 17, 0.8);
  border: 1px solid var(--border);
  border-radius: 5px;
  display: inline-flex; align-items: center; gap: 9px;
}
.step .s-code::before { content: "$"; color: var(--dim); }

/* ===== 时间线 ===== */
.timeline { margin-top: 64px; }
.tl-item {
  display: grid; grid-template-columns: 170px 1fr;
  gap: 36px; padding: 30px 20px;
  border-top: 1px solid var(--border);
  transition: background 0.45s cubic-bezier(0.16, 1, 0.3, 1), padding-left 0.45s cubic-bezier(0.16, 1, 0.3, 1);
  border-radius: 4px;
}
.tl-item:last-child { border-bottom: 1px solid var(--border); }
.tl-item:hover { background: rgba(13, 17, 23, 0.6); padding-left: 28px; }
.tl-ver { font-family: var(--mono); font-weight: 700; font-size: 19px; color: var(--text); transition: color 0.35s cubic-bezier(0.16, 1, 0.3, 1); }
.tl-item:hover .tl-ver { color: var(--accent-2); }
.tl-ver small { display: block; font-size: 11px; color: var(--dim); font-weight: 500; margin-top: 5px; font-family: var(--font); letter-spacing: 0.5px; }
.tl-ver .new {
  display: inline-block;
  margin-top: 8px; font-size: 9.5px; font-weight: 700;
  color: var(--accent-2); letter-spacing: 1.5px;
  border: 1px solid rgba(61,139,255,0.45);
  padding: 2px 8px; border-radius: 3px;
  font-family: var(--mono);
}
.tl-body h4 { font-size: 16px; margin-bottom: 7px; font-weight: 600; }
.tl-body p { font-size: 13.5px; color: var(--muted); line-height: 1.85; }

/* ===== 新闻：大行列表 ===== */
.news-list { margin-top: 64px; }
.news-row {
  display: grid;
  grid-template-columns: 130px 1fr 42px;
  align-items: center;
  gap: 30px;
  padding: 32px 24px;
  border-top: 1px solid var(--border);
  transition: background 0.45s cubic-bezier(0.16, 1, 0.3, 1), padding-left 0.45s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: default;
  position: relative;
}
.news-row:last-child { border-bottom: 1px solid var(--border); }
.news-row::before {
  content: "";
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 2px; background: var(--accent);
  transform: scaleY(0);
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.news-row:hover { background: rgba(13, 17, 23, 0.6); padding-left: 32px; }
.news-row:hover::before { transform: scaleY(1); }
.news-row .n-date {
  font-family: var(--mono);
  font-size: 15px; font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.5px;
}
.news-row .n-meta { display: flex; align-items: center; gap: 14px; margin-bottom: 8px; }
.news-row .n-tag {
  font-size: 10px; font-weight: 700; letter-spacing: 1.5px;
  padding: 3px 9px; border-radius: 3px;
  text-transform: uppercase; font-family: var(--mono);
}
.news-row .n-tag.release { background: var(--accent-dim); color: var(--accent-2); }
.news-row .n-tag.update { background: rgba(125,211,252,0.1); color: #7dd3fc; }
.news-row .n-tag.event { background: rgba(251,191,36,0.1); color: #fbbf24; }
.news-row h4 { font-size: 17px; font-weight: 650; margin-bottom: 6px; line-height: 1.5; }
.news-row p { font-size: 13.5px; color: var(--muted); line-height: 1.8; max-width: 640px; }
.news-row .n-arrow { font-size: 20px; color: var(--dim); transition: color 0.35s cubic-bezier(0.16, 1, 0.3, 1), transform 0.35s cubic-bezier(0.16, 1, 0.3, 1); text-align: right; }
.news-row:hover .n-arrow { color: var(--accent); transform: translateX(5px); }

/* ===== FAQ ===== */
.faq { margin-top: 64px; max-width: 900px; }
.faq-item {
  padding: 28px 20px;
  border-top: 1px solid var(--border);
  display: grid; grid-template-columns: 220px 1fr; gap: 36px;
  transition: background 0.45s cubic-bezier(0.16, 1, 0.3, 1), padding-left 0.45s cubic-bezier(0.16, 1, 0.3, 1);
  border-radius: 4px;
}
.faq-item:last-child { border-bottom: 1px solid var(--border); }
.faq-item:hover { background: rgba(13, 17, 23, 0.6); padding-left: 28px; }
.faq-item h4 { font-size: 15px; font-weight: 600; color: var(--text); transition: color 0.35s cubic-bezier(0.16, 1, 0.3, 1); }
.faq-item:hover h4 { color: var(--accent-2); }
.faq-item p { font-size: 13.5px; color: var(--muted); line-height: 1.9; }

/* ===== 投稿页 ===== */
.contest-hero { padding: 120px 0 60px; position: relative; overflow: hidden; }
.contest-hero::before {
  content: "";
  position: absolute;
  width: 820px; height: 560px;
  top: -140px; right: -160px;
  background: radial-gradient(closest-side, rgba(61,139,255,0.09), transparent 70%);
  filter: blur(20px);
  animation: drift2 18s ease-in-out infinite alternate;
  pointer-events: none;
}
.contest-hero .hero-badge {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--mono);
  font-size: 12px; font-weight: 600; letter-spacing: 3px;
  color: var(--accent-2); text-transform: uppercase;
  margin-bottom: 30px;
}
.contest-hero .hero-badge::before {
  content: "";
  width: 32px; height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
}
.contest-hero .pulse-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 8px var(--accent); }
.contest-hero h1 {
  font-size: clamp(42px, 6.2vw, 66px);
  font-weight: 800; letter-spacing: -1.5px;
  line-height: 1.12; margin-bottom: 26px;
}
.contest-hero h1 .grad {
  background: linear-gradient(115deg, #ffffff 0%, #e8f2ff 15%, #9ccfff 40%, #5aa8ff 65%, #2563eb 90%, #1e40af 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 3px 22px rgba(37,99,235,0.4));
}
.contest-hero p { color: var(--muted); max-width: 660px; font-size: 16.5px; line-height: 1.9; }

.contest-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin: 70px 0; }
.c-step {
  padding: 32px 28px;
  border: 1px solid var(--border);
  margin: -1px 0 0 -1px;
  transition: background 0.45s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}
.c-step:hover { background: var(--bg-3); border-color: var(--border-2); }
.c-step .s-no {
  font-family: var(--mono); font-weight: 700; color: var(--accent);
  font-size: 14px; margin-bottom: 16px; letter-spacing: 2px;
}
.c-step h3 { font-size: 15.5px; margin-bottom: 9px; font-weight: 650; }
.c-step p { font-size: 12.5px; color: var(--muted); line-height: 1.85; }

.form-panel {
  border: 1px solid var(--border-2);
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(14, 18, 24, 0.95), rgba(8, 10, 13, 0.98));
  padding: 50px;
  max-width: 900px;
  margin: 0 auto 80px;
  box-shadow: 0 40px 100px rgba(0,0,0,0.45);
}
.form-panel h3 { font-size: 23px; margin-bottom: 6px; font-weight: 750; }
.form-panel .p-sub { color: var(--muted); font-size: 13.5px; margin-bottom: 36px; }
.form-row { margin-bottom: 24px; }
.form-row label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 9px; color: #c6ced8; }
.form-row input[type="text"],
.form-row input[type="email"],
.form-row textarea {
  width: 100%; padding: 13px 16px;
  border-radius: 6px; border: 1px solid var(--border-2);
  background: rgba(7, 9, 11, 0.7); color: var(--text);
  font-size: 14px; font-family: var(--font);
  outline: none; transition: border-color 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.form-row input:focus, .form-row textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(61,139,255,0.12);
}
.form-row textarea { resize: vertical; min-height: 92px; }
.form-row ::placeholder { color: #4a5563; }
.file-box {
  border: 1.5px dashed var(--border-2);
  border-radius: 8px; padding: 36px;
  text-align: center; color: var(--muted);
  cursor: pointer; transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.file-box:hover { border-color: var(--accent); color: var(--text); background: var(--accent-dim); }
.file-box .f-i { font-size: 22px; margin-bottom: 6px; color: var(--accent); }
.file-box p { font-size: 13px; }
.file-box p b { color: var(--text); }
.file-list { margin-top: 10px; display: grid; gap: 6px; }
.file-list div {
  font-size: 12.5px; color: var(--accent-2);
  background: var(--accent-dim); border-radius: 5px;
  padding: 7px 12px;
  display: flex; justify-content: space-between; align-items: center;
}
.file-list button { background: none; border: none; color: var(--dim); cursor: pointer; font-size: 14px; }
.file-list button:hover { color: #ff6b6b; }
.submit-btn {
  width: 100%; padding: 16px;
  border-radius: 10px; border: none;
  background: linear-gradient(135deg, #5aa8ff 0%, #2563eb 100%);
  color: #ffffff;
  font-size: 15.5px; font-weight: 700;
  cursor: pointer;
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 8px 28px rgba(37,99,235,0.4), inset 0 1px 0 rgba(255,255,255,0.3);
  position: relative; overflow: hidden;
}
.submit-btn::before {
  content: "";
  position: absolute; top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.submit-btn:hover::before { left: 100%; }
.submit-btn:hover {
  background: linear-gradient(135deg, #6db3ff 0%, #2f6ff5 100%);
  box-shadow: 0 16px 42px rgba(37,99,235,0.55), inset 0 1px 0 rgba(255,255,255,0.4);
  transform: translateY(-2px);
}
.submit-btn:disabled { opacity: 0.6; cursor: not-allowed; }
.submit-result { margin-top: 14px; font-size: 13.5px; }
.form-note { margin-top: 14px; font-size: 12px; color: var(--dim); line-height: 1.8; }

.panel {
  border: 1px solid var(--border-2);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(16, 20, 28, 0.96), rgba(8, 10, 13, 0.99));
  padding: 40px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.35), inset 0 1px 0 rgba(255,255,255,0.04);
  transition: border-color 0.5s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.5s cubic-bezier(0.16, 1, 0.3, 1), transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.panel:hover {
  border-color: rgba(61,139,255,0.3);
  box-shadow: 0 28px 70px rgba(0,0,0,0.45), inset 0 1px 0 rgba(255,255,255,0.06), 0 0 40px rgba(37,99,235,0.08);
}
.contest-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 26px; align-items: start; }
.panel h3 { font-size: 21px; margin-bottom: 6px; font-weight: 750; }
.panel .p-sub { color: var(--muted); font-size: 13.5px; margin-bottom: 26px; }
.panel h4 { color: var(--text); }
.panel p, .panel li { color: var(--muted); font-size: 13px; line-height: 1.9; }
.panel ul { padding-left: 18px; display: grid; gap: 7px; }
.wall-empty {
  border: 1px dashed var(--border-2);
  border-radius: 12px; padding: 76px 20px;
  text-align: center; color: var(--muted);
}
.wall-empty .w-i { font-size: 32px; margin-bottom: 12px; color: var(--accent); }
.wall-empty h4 { font-size: 17px; color: var(--text); margin-bottom: 9px; }
.wall-empty p { font-size: 13px; }

.wall-flow {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 24px;
  width: 100vw;
  margin-left: calc(50% - 50vw);
}
.flow-item {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #0a0d12;
}
.flow-item img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 1.2s cubic-bezier(0.16, 1, 0.3, 1), filter 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  filter: brightness(0.85) saturate(1.05);
}
.flow-item:hover img { transform: scale(1.06); filter: brightness(1) saturate(1.15); }
.flow-item::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(5,7,10,0.15) 100%);
  pointer-events: none;
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.flow-item:hover::after { opacity: 0; }
.flow-caption {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 52px 40px 32px;
  background: linear-gradient(transparent, rgba(5,7,10,0.92));
  transform: translateY(4px);
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.flow-item:hover .flow-caption { transform: translateY(0); }
.flow-title { font-size: 22px; font-weight: 700; color: #fff; margin-bottom: 6px; letter-spacing: 0.5px; }
.flow-meta { display: flex; align-items: center; gap: 18px; }
.flow-no { font-family: var(--mono); font-size: 11px; color: #7cc4ff; letter-spacing: 2px; }
.flow-en { font-family: var(--mono); font-size: 10.5px; color: rgba(255,255,255,0.5); letter-spacing: 1.5px; text-transform: uppercase; }
@media (max-width: 760px) {
  .wall-flow { gap: 0; margin-top: 16px; }
  .flow-item { aspect-ratio: 4 / 3; }
  .flow-title { font-size: 17px; }
  .flow-caption { padding: 32px 20px 18px; }
}
.terms { display: grid; grid-template-columns: 1fr 1fr; gap: 0; }
.term-block {
  padding: 32px;
  border: 1px solid var(--border);
  margin: -1px 0 0 -1px;
  transition: background 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}
.term-block:hover { background: var(--bg-3); }
.term-block h4 { font-size: 14.5px; margin-bottom: 10px; color: var(--accent-2); font-weight: 600; }

.back-top {
  position: fixed; right: 28px; bottom: 32px;
  width: 44px; height: 44px; border-radius: 8px;
  border: 1px solid var(--border-2); background: rgba(14, 18, 24, 0.9);
  color: var(--text); font-size: 16px; cursor: pointer;
  opacity: 0; pointer-events: none;
  transition: all 0.45s cubic-bezier(0.16, 1, 0.3, 1); z-index: 60;
  backdrop-filter: blur(12px);
}
.back-top.show { opacity: 1; pointer-events: auto; }
.back-top:hover { border-color: var(--accent); color: var(--accent-2); transform: translateY(-3px); }

/* ===== 页脚 ===== */
.footer {
  border-top: 1px solid var(--border);
  padding: 64px 0 36px;
  margin-top: 44px;
  position: relative;
  background: linear-gradient(180deg, transparent 0%, rgba(61,139,255,0.025) 40%, rgba(61,139,255,0.04) 100%);
}
.footer::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(61,139,255,0.5), transparent);
}
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; gap: 44px; flex-wrap: wrap; }
.footer .brand img { width: 40px; height: 40px; padding: 5px; }
.footer-col h5 {
  font-size: 10.5px; color: var(--muted); font-weight: 700;
  margin-bottom: 16px; letter-spacing: 2.5px; text-transform: uppercase;
  font-family: var(--mono);
  padding-left: 10px; position: relative;
}
.footer-col h5::before {
  content: ""; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  width: 3px; height: 12px; border-radius: 2px;
  background: linear-gradient(180deg, #5aa8ff, #2563eb);
}
.footer-col a { display: block; font-size: 13px; color: var(--muted); margin-bottom: 9px; transition: color 0.25s, transform 0.25s; }
.footer-col a:hover { color: var(--accent-2); transform: translateX(3px); }

.footer-social { display: flex; gap: 12px; margin-top: 4px; }
.footer-social a { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08); transition: all 0.3s cubic-bezier(0.16,1,0.3,1); margin-bottom: 0; }
.footer-social a:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.16); transform: translateY(-2px); }
.footer-social img { width: 18px; height: 18px; }

.footer-bottom {
  margin-top: 48px; padding-top: 26px;
  border-top: 1px solid transparent;
  border-image: linear-gradient(90deg, transparent, rgba(61,139,255,0.3), transparent) 1;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: 11.5px; color: var(--dim); letter-spacing: 0.4px;
}

/* ===== 滚动显现 ===== */
.reveal {
  opacity: 0;
  transform: translateY(36px);
  filter: blur(8px);
  transition: opacity 1.1s cubic-bezier(0.16, 1, 0.3, 1), transform 1.1s cubic-bezier(0.16, 1, 0.3, 1), filter 1.1s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.visible { opacity: 1; transform: none; filter: none; }

/* ===== 响应式 ===== */
@media (max-width: 920px) {
  .nav-links { display: none; }
  .func-row { grid-template-columns: 72px 1fr 32px; gap: 20px; }
  .func-row .f-desc { grid-column: 2 / 4; }
  .news-row { grid-template-columns: 100px 1fr 32px; gap: 20px; }
  .news-row p { grid-column: 2 / 4; }
  .steps { grid-template-columns: 1fr; gap: 38px; }
  .step { border-left: none; padding-left: 0; border-top: 1px solid var(--border); padding-top: 30px; }
  .step:first-child { border-top: none; padding-top: 0; }
  .contest-steps { grid-template-columns: 1fr 1fr; }
  .contest-grid { grid-template-columns: 1fr; }
  .tl-item, .faq-item { grid-template-columns: 1fr; gap: 8px; }
  .section { padding: 76px 0; }
  .hero { padding: 80px 0 50px; min-height: auto; }
  .section .ghost-no { font-size: 100px; }
}
@media (max-width: 560px) {
  .contest-steps { grid-template-columns: 1fr; }
  .demo-body { font-size: 11.5px; padding: 20px; }
  .form-panel { padding: 28px 22px; }
  .func-row { grid-template-columns: 1fr 28px; }
  .func-row .f-no { grid-column: 1 / 3; font-size: 30px; }
  .news-row { grid-template-columns: 1fr 28px; }
  .news-row .n-date { grid-column: 1 / 3; }
}



/* ===== 赞助支持 ===== */
.sponsor-section .section-desc {
  color: var(--muted);
  margin-top: 8px;
  margin-bottom: 32px;
  font-size: 15px;
}
.sponsor-amounts-row {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.sponsor-amt {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px 36px;
  cursor: pointer;
  text-align: center;
  transition: all 0.45s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 140px;
}
.sponsor-amt:hover {
  border-color: var(--accent);
  background: rgba(61,139,255,0.1);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(61,139,255,0.2);
}
.sponsor-amt .amt-num {
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.5px;
}
.sponsor-amt:hover .amt-num {
  color: var(--accent-2);
}
.sponsor-amt .amt-label {
  font-size: 13px;
  color: var(--muted);
}

/* 弹窗 */
.sponsor-modal {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  display: none;
  z-index: 9999;
  align-items: center;
  justify-content: center;
}
.sponsor-modal.show {
  display: flex;
}
.sponsor-modal-mask {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(8px);
}
.sponsor-modal-box {
  position: relative;
  background: linear-gradient(160deg, #111820, #0a0e13);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 36px 40px;
  text-align: center;
  max-width: 380px;
  width: 90%;
  box-shadow: 0 24px 80px rgba(0,0,0,0.5);
  animation: modalIn 0.3s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(0.9) translateY(20px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}
.sponsor-modal-close {
  position: absolute;
  top: 14px; right: 18px;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 28px;
  cursor: pointer;
  line-height: 1;
  transition: color 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}
.sponsor-modal-close:hover {
  color: #fff;
}
.sponsor-modal-title {
  font-size: 18px;
  color: #fff;
  margin-bottom: 8px;
  font-weight: 600;
}
.sponsor-modal-amount {
  font-size: 36px;
  font-weight: 700;
  color: var(--accent-2);
  margin-bottom: 20px;
}
.sponsor-modal-qr {
  background: #fff;
  padding: 16px;
  border-radius: 18px;
  display: inline-block;
  margin-bottom: 16px;
}
.sponsor-modal-qr img {
  width: 240px;
  height: 240px;
  display: block;
}
.sponsor-modal-tip {
  font-size: 13px;
  color: var(--muted);
}
@media (max-width: 768px) {
  .sponsor-amt {
    min-width: 100px;
    padding: 16px 24px;
  }
  .sponsor-amt .amt-num {
    font-size: 22px;
  }
  .sponsor-modal-qr img {
    width: 200px;
    height: 200px;
  }
}


/* ============================================================
   大改升级 · 新板块样式
   ============================================================ */

/* ===== 区块标题 ===== */
.section-head { margin-bottom: 56px; }
.section-head h2 {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: 16px;
  background: linear-gradient(115deg, #ffffff 0%, #e8f2ff 20%, #9ccfff 50%, #5aa8ff 75%, #2563eb 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 4px 24px rgba(37,99,235,0.35));
}
.section-head p {
  color: var(--muted);
  font-size: 16px;
  max-width: 560px;
  line-height: 1.85;
}

/* ===== 数据统计 ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(14,18,24,0.9), rgba(8,10,13,0.95));
  box-shadow: 0 30px 80px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.04);
}
.stat-item {
  padding: 48px 36px;
  border-right: 1px solid var(--border);
  position: relative;
  transition: background 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.stat-item:last-child { border-right: none; }
.stat-item:hover { background: rgba(37,99,235,0.06); }
.stat-num {
  font-size: clamp(42px, 5vw, 64px);
  font-weight: 800;
  letter-spacing: -2px;
  line-height: 1;
  background: linear-gradient(135deg, #7cc4ff 0%, #3d8bff 50%, #1d4ed8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 2px 16px rgba(37,99,235,0.4));
  font-family: var(--mono);
}
.stat-label {
  margin-top: 14px;
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  font-weight: 600;
}
.stat-line {
  margin-top: 20px;
  width: 32px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  transition: width 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.stat-item:hover .stat-line { width: 64px; }
@media (max-width: 900px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
  .stat-item:nth-child(1), .stat-item:nth-child(2) { border-bottom: 1px solid var(--border); }
}

/* ===== 精选特写 ===== */
.featured-layout {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 20px;
  margin-top: 8px;
}
.featured-main {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  box-shadow: 0 40px 100px rgba(0,0,0,0.5);
}
.featured-img-wrap {
  position: relative;
  width: 100%;
  height: 100%;
}
.featured-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.2s cubic-bezier(0.16, 1, 0.3, 1), filter 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  filter: brightness(0.75) saturate(1.1);
}
.featured-main:hover .featured-img-wrap img {
  transform: scale(1.05);
  filter: brightness(0.9) saturate(1.2);
}
.featured-overlay {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 48px 40px 36px;
  background: linear-gradient(transparent, rgba(5,7,10,0.95));
}
.featured-tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: #fff;
  background: linear-gradient(135deg, #3d8bff, #1d4ed8);
  padding: 5px 12px;
  border-radius: 4px;
  margin-bottom: 16px;
  font-family: var(--mono);
}
.featured-overlay h3 {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  margin-bottom: 10px;
  letter-spacing: -0.5px;
}
.featured-overlay p {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  line-height: 1.8;
  max-width: 520px;
  margin-bottom: 14px;
}
.featured-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: rgba(255,255,255,0.5);
  font-family: var(--mono);
  letter-spacing: 0.5px;
}
.featured-side {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.featured-small {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  flex: 1;
  min-height: 0;
  box-shadow: 0 20px 50px rgba(0,0,0,0.4);
  cursor: pointer;
}
.featured-small img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1s cubic-bezier(0.16, 1, 0.3, 1), filter 0.6s;
  filter: brightness(0.7);
}
.featured-small:hover img {
  transform: scale(1.06);
  filter: brightness(0.85);
}
.fs-info {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 24px 20px 18px;
  background: linear-gradient(transparent, rgba(5,7,10,0.9));
}
.fs-no {
  font-family: var(--mono);
  font-size: 10px;
  color: #7cc4ff;
  letter-spacing: 2px;
}
.fs-info h4 {
  font-size: 17px;
  font-weight: 700;
  margin: 4px 0 2px;
}
.fs-info p {
  font-size: 12px;
  color: rgba(255,255,255,0.5);
}
@media (max-width: 900px) {
  .featured-layout { grid-template-columns: 1fr; }
  .featured-side { flex-direction: row; }
  .featured-small { aspect-ratio: 4 / 3; }
}

/* ===== 拍摄技巧 ===== */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 8px;
}
.tip-card {
  padding: 36px 28px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(14,18,24,0.8), rgba(8,10,13,0.95));
  position: relative;
  overflow: hidden;
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.tip-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  transform: scaleX(0);
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.tip-card:hover {
  border-color: rgba(61,139,255,0.35);
  transform: translateY(-6px);
  box-shadow: 0 24px 60px rgba(0,0,0,0.4), 0 0 40px rgba(37,99,235,0.1);
}
.tip-card:hover::before { transform: scaleX(1); }
.tip-no {
  font-family: var(--mono);
  font-size: 42px;
  font-weight: 800;
  background: linear-gradient(180deg, rgba(61,139,255,0.5), rgba(61,139,255,0.08));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 20px;
}
.tip-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
}
.tip-card p {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.85;
  margin-bottom: 18px;
}
.tip-tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent-2);
  border: 1px solid rgba(61,139,255,0.3);
  padding: 4px 10px;
  border-radius: 4px;
  font-family: var(--mono);
}
@media (max-width: 1100px) {
  .tips-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .tips-grid { grid-template-columns: 1fr; }
}

/* ===== 创作者介绍 ===== */
.creators-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 8px;
}
.creator-card {
  padding: 40px 32px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(14,18,24,0.85), rgba(8,10,13,0.98));
  text-align: center;
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}
.creator-card::after {
  content: "";
  position: absolute;
  bottom: 0; left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.creator-card:hover {
  border-color: rgba(61,139,255,0.35);
  transform: translateY(-6px);
  box-shadow: 0 28px 70px rgba(0,0,0,0.45), 0 0 50px rgba(37,99,235,0.12);
}
.creator-card:hover::after { width: 80%; }
.creator-avatar {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, #5aa8ff, #1d4ed8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  box-shadow: 0 8px 24px rgba(37,99,235,0.4), inset 0 1px 0 rgba(255,255,255,0.3);
}
.creator-card h3 {
  font-size: 19px;
  font-weight: 750;
  margin-bottom: 6px;
}
.creator-role {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent-2);
  font-family: var(--mono);
  margin-bottom: 16px;
}
.creator-desc {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.85;
  margin-bottom: 18px;
}
.creator-works {
  font-size: 12px;
  color: var(--dim);
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-family: var(--mono);
  letter-spacing: 0.3px;
}
@media (max-width: 900px) {
  .creators-grid { grid-template-columns: 1fr; }
}

/* ===== 作品墙标题升级 ===== */
.wall-flow { margin-top: 8px; }
.flow-item {
  position: relative;
}
.flow-item::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(61,139,255,0.4), transparent);
  z-index: 2;
  opacity: 0;
  transition: opacity 0.6s;
}
.flow-item:hover::before { opacity: 1; }
.flow-title {
  font-size: clamp(20px, 2.5vw, 30px);
  font-weight: 800;
  letter-spacing: 0.5px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.6);
}
.flow-no {
  color: #7cc4ff;
  font-weight: 600;
}

/* ===== Hero升级 ===== */
.contest-hero {
  padding: 140px 0 80px;
}
.contest-hero h1 {
  font-size: clamp(48px, 7vw, 80px);
  font-weight: 850;
  letter-spacing: -2px;
  line-height: 1.05;
}
.contest-hero p {
  font-size: 17px;
  line-height: 2;
}

/* ===== 投稿步骤升级 ===== */
.c-step {
  position: relative;
  overflow: hidden;
}
.c-step::after {
  content: "";
  position: absolute;
  bottom: 0; left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  transition: width 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.c-step:hover::after { width: 100%; }
.c-step .s-no {
  font-size: 16px;
  font-weight: 700;
  background: linear-gradient(135deg, #7cc4ff, #2563eb);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}


/* ===== 优秀作品板块 ===== */
.excellent-grid {
  margin-top: 8px;
}
.excellent-empty {
  border: 1.5px dashed var(--border-2);
  border-radius: 16px;
  padding: 80px 40px;
  text-align: center;
  background: linear-gradient(180deg, rgba(14,18,24,0.6), rgba(8,10,13,0.8));
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.excellent-empty:hover {
  border-color: rgba(61,139,255,0.4);
  background: linear-gradient(180deg, rgba(14,18,24,0.8), rgba(8,10,13,0.9));
}
.ee-icon {
  font-size: 48px;
  margin-bottom: 20px;
  opacity: 0.6;
}
.excellent-empty h4 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 10px;
}
.excellent-empty p {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 28px;
  line-height: 1.8;
}

/* 数据统计5列适配 */
.stats-grid {
  grid-template-columns: repeat(4, 1fr);
}
@media (min-width: 1200px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}


/* ===== 官方图库缩略图网格 ===== */
.gallery-thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 8px;
}
.gt-item {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: 10px;
  overflow: hidden;
  cursor: pointer;
  display: block;
  box-shadow: 0 12px 32px rgba(0,0,0,0.35);
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.gt-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1), filter 0.5s;
  filter: brightness(0.8) saturate(1.05);
}
.gt-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.5), 0 0 30px rgba(37,99,235,0.15);
}
.gt-item:hover img {
  transform: scale(1.08);
  filter: brightness(0.95) saturate(1.15);
}
.gt-overlay {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 16px 14px 12px;
  background: linear-gradient(transparent, rgba(5,7,10,0.9));
  display: flex;
  flex-direction: column;
  gap: 3px;
  transform: translateY(4px);
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.gt-item:hover .gt-overlay {
  transform: translateY(0);
}
.gt-no {
  font-family: var(--mono);
  font-size: 9px;
  color: #7cc4ff;
  letter-spacing: 1.5px;
}
.gt-title {
  font-size: 13px;
  font-weight: 650;
  color: #fff;
}
.gt-more {
  background: linear-gradient(135deg, rgba(14,18,24,0.95), rgba(8,10,13,0.98));
  border: 1px solid var(--border-2);
  display: flex;
  align-items: center;
  justify-content: center;
}
.gt-more:hover {
  border-color: rgba(61,139,255,0.4);
}
.gt-more-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.gt-more-num {
  font-size: 28px;
  font-weight: 800;
  background: linear-gradient(135deg, #7cc4ff, #2563eb);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-family: var(--mono);
}
.gt-more-text {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 1px;
}

/* 优秀作品空状态（去掉emoji后） */
.ee-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  border-radius: 50%;
  border: 1.5px solid var(--border-2);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.ee-icon::before {
  content: "";
  width: 24px;
  height: 18px;
  border: 1.5px solid var(--accent-2);
  border-radius: 3px;
  position: relative;
}
.ee-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1.5px solid var(--accent-2);
}

@media (max-width: 900px) {
  .gallery-thumbs { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 560px) {
  .gallery-thumbs { grid-template-columns: repeat(2, 1fr); }
}


  .product-download { position: static; }
  .live-grid { grid-template-columns: 1fr; }
  .live-total { grid-column: span 1; }
}