/* roulang page: index */
:root {
  --bg: #0A0C10;
  --bg-2: #12151B;
  --surface: #161B23;
  --surface-2: #1D232E;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.14);
  --neon: #49E8B4;
  --neon-soft: rgba(73, 232, 180, 0.14);
  --neon-glow: rgba(73, 232, 180, 0.4);
  --accent: #F55E8C;
  --warm: #F6C85F;
  --txt: #E9ECF1;
  --muted: #8A93A2;
  --txt-light: #C7CEDA;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 24px 60px rgba(0, 0, 0, 0.45);
  --max-w: 1200px;
  --font-sans: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Inter", Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--txt);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius-md);
}

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

button,
input {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  color: inherit;
}

ul,
ol {
  list-style: none;
}

.container {
  width: min(var(--max-w), calc(100% - 48px));
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.section {
  padding: 110px 0;
  position: relative;
}

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

.section-head {
  margin-bottom: 56px;
}

.section-head .kicker,
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--neon);
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-family: var(--font-mono);
  margin-bottom: 14px;
  background: var(--neon-soft);
  border: 1px solid rgba(73, 232, 180, 0.18);
  padding: 5px 14px;
  border-radius: 999px;
}

.section-head h2 {
  font-size: clamp(28px, 4vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 800;
  max-width: 720px;
  margin-bottom: 14px;
}

.section-head .section-desc {
  font-size: 16px;
  color: var(--muted);
  max-width: 720px;
}

.text-gradient {
  background: linear-gradient(135deg, var(--neon) 0%, #79F5D2 50%, var(--warm) 130%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ===== header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(10, 12, 16, 0.72);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
  transition: background 0.3s ease, box-shadow 0.3s ease, padding 0.3s ease;
}

.site-header.scrolled {
  background: rgba(10, 12, 16, 0.92);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 20px;
  transition: height 0.3s ease;
}

.site-header.scrolled .header-inner {
  height: 62px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--txt);
  position: relative;
  flex-shrink: 0;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(145deg, rgba(73, 232, 180, 0.2), rgba(73, 232, 180, 0.05));
  border: 1px solid rgba(73, 232, 180, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neon);
  box-shadow: 0 0 24px rgba(73, 232, 180, 0.15);
}

.brand-mark svg {
  width: 18px;
  height: 18px;
}

.brand small {
  display: block;
  font-size: 11px;
  color: var(--muted);
  font-weight: 400;
  letter-spacing: 0.04em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
}

.main-nav a {
  position: relative;
  font-size: 15px;
  color: #C3CAD4;
  padding: 10px 0;
  transition: color 0.25s ease;
  font-weight: 500;
}

.main-nav a:hover {
  color: #FFFFFF;
}

.main-nav a.active {
  color: #FFFFFF;
  text-shadow: 0 0 12px rgba(73, 232, 180, 0.35);
}

.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--neon);
  box-shadow: 0 0 10px var(--neon-glow), 0 0 22px rgba(73, 232, 180, 0.3);
}

.header-cta {
  margin-left: 4px;
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
  border: 1px solid transparent;
  min-height: 44px;
}

.btn-sm {
  padding: 9px 18px;
  font-size: 14px;
  min-height: 38px;
}

.btn-primary {
  background: linear-gradient(145deg, #5CF0C2, #38CEA0);
  color: #08120E;
  box-shadow: 0 0 18px rgba(73, 232, 180, 0.25), 0 4px 16px rgba(0, 0, 0, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(145deg, #7CF5D0, #4FD9AE);
  box-shadow: 0 0 30px rgba(73, 232, 180, 0.4);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 0 12px rgba(73, 232, 180, 0.25);
}

.btn-ghost {
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.02);
  color: var(--txt-light);
}

.btn-ghost:hover {
  border-color: var(--neon);
  color: var(--neon);
  box-shadow: 0 0 20px rgba(73, 232, 180, 0.15);
  transform: translateY(-2px);
}

.btn-ghost:active {
  transform: translateY(0);
}

.btn-overdark {
  background: #FFFFFF;
  color: #0B0E13;
  box-shadow: 0 0 0 rgba(255, 255, 255, 0.2);
}

.btn-overdark:hover {
  background: #E8FFF6;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3), 0 0 20px rgba(73, 232, 180, 0.12);
  transform: translateY(-2px);
}

:where(a, button, summary, input, [tabindex]):focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 4px;
  border-radius: 8px;
}

/* ===== hero ===== */
.hero {
  padding: 170px 0 100px;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: linear-gradient(135deg, rgba(10, 12, 16, 0.92) 20%, rgba(10, 12, 16, 0.78) 50%, rgba(10, 12, 16, 0.94) 100%), url('/assets/images/backpic/back-1.jpg');
  background-size: cover;
  background-position: center;
}

.hero-bg::after {
  content: "";
  position: absolute;
  right: -120px;
  top: -80px;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(73, 232, 180, 0.12) 0%, rgba(73, 232, 180, 0) 60%);
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 64px;
  align-items: center;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

.hero-copy .eyebrow {
  color: var(--neon);
  background: rgba(73, 232, 180, 0.08);
}

.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 0 rgba(73, 232, 180, 0.6);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(73, 232, 180, 0.5); }
  70% { box-shadow: 0 0 0 8px rgba(73, 232, 180, 0); }
  100% { box-shadow: 0 0 0 0 rgba(73, 232, 180, 0); }
}

.hero h1 {
  font-size: clamp(36px, 5vw, 58px);
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 22px 0 24px;
}

.hero-lead {
  font-size: 17px;
  color: var(--muted);
  max-width: 580px;
  margin-bottom: 34px;
}

.hero-lead strong {
  color: var(--txt-light);
  font-weight: 600;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 40px;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.hero-stats li {
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 20px;
  min-width: 140px;
}

.hero-stats strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--neon);
  line-height: 1.2;
  margin-bottom: 2px;
}

.hero-stats span {
  font-size: 13px;
  color: var(--muted);
}

/* Hero visual */
.hero-visual {
  position: relative;
  z-index: 2;
}

.stage-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 22px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.stage-card .stage-img {
  height: 200px;
  width: 100%;
  object-fit: cover;
  border-radius: 0;
  opacity: 0.9;
}

.stage-main {
  padding: 26px 28px 24px;
}

.stage-main .stage-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.stage-label span {
  font-size: 12px;
  color: var(--muted);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.stage-label em {
  font-style: normal;
  background: rgba(245, 94, 140, 0.14);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid rgba(245, 94, 140, 0.2);
}

.stage-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 18px;
  line-height: 1.35;
}

.stage-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.stage-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  color: var(--txt-light);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 11px 14px;
  line-height: 1.5;
}

.stage-list li svg {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  margin-top: 3px;
  color: var(--neon);
}

.progress-track {
  margin-top: 20px;
  background: rgba(255, 255, 255, 0.05);
  height: 8px;
  border-radius: 10px;
  overflow: hidden;
}

.progress-bar {
  width: 68%;
  height: 100%;
  background: linear-gradient(90deg, var(--neon), #85F6D4);
  border-radius: 10px;
}

.countdown-card {
  position: absolute;
  right: -14px;
  bottom: -18px;
  background: var(--surface-2);
  border: 1px solid rgba(73, 232, 180, 0.35);
  padding: 16px 20px;
  border-radius: 16px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 30px rgba(73, 232, 180, 0.08);
  min-width: 200px;
}

.countdown-card .cd-label {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 10px;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

.countdown-cols {
  display: flex;
  align-items: center;
  gap: 12px;
}

.countdown-cols .cd-item {
  text-align: center;
}

.countdown-cols .cd-num {
  font-family: var(--font-mono);
  font-size: 25px;
  font-weight: 700;
  color: var(--neon);
  background: rgba(73, 232, 180, 0.08);
  border: 1px solid rgba(73, 232, 180, 0.2);
  border-radius: 10px;
  padding: 4px 9px;
  min-width: 48px;
  display: inline-block;
  line-height: 1.3;
}

.countdown-cols .cd-unit {
  font-size: 12px;
  color: var(--muted);
}

.cd-sep {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 18px;
  margin-top: -16px;
}

.countdown-hint {
  position: absolute;
  right: -14px;
  bottom: -18px;
  width: 12px;
  height: 12px;
  opacity: 0;
}

/* ===== 卖点三连 ===== */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.feature-wide {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 0.72fr;
  align-items: stretch;
  overflow: hidden;
  padding: 0;
}

.feature-wide .fe-text {
  padding: 40px 40px 38px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px 30px;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  position: relative;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: rgba(73, 232, 180, 0.35);
  box-shadow: var(--shadow-hover), 0 0 20px rgba(73, 232, 180, 0.06);
}

.fe-count {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--neon);
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(73, 232, 180, 0.3);
  background: var(--neon-soft);
  border-radius: 999px;
  padding: 3px 12px;
  margin-bottom: 22px;
}

.feature-card h3 {
  font-size: 23px;
  font-weight: 750;
  line-height: 1.35;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.feature-card p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
  margin-bottom: 18px;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.feature-tags li {
  font-size: 12px;
  color: #8FB8A8;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  padding: 5px 11px;
  border-radius: 999px;
  transition: border-color 0.2s ease;
}

.feature-tags li:hover {
  border-color: rgba(73, 232, 180, 0.3);
}

.feature-media {
  min-height: 240px;
  background: var(--bg-2);
  background-image: linear-gradient(135deg, rgba(73, 232, 180, 0.04), transparent 50%);
}

.feature-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0;
  aspect-ratio: 16 / 10;
}

.stacked-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.media-top img {
  width: 100%;
  aspect-ratio: 16 / 8;
  object-fit: cover;
  border-radius: 0 0 14px 14px;
  margin-top: 22px;
}

/* ===== 指标 ===== */
.metrics-band {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 22px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.metrics-bg {
  background-image: linear-gradient(135deg, rgba(10, 12, 16, 0.52), rgba(10, 12, 16, 0.9)), url('/assets/images/backpic/back-4.jpg');
  background-size: cover;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  align-items: center;
  padding: 56px 60px;
}

.metrics-item {
  text-align: left;
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  padding-left: 28px;
}

.metrics-item:first-child {
  border-left: none;
  padding-left: 0;
}

.metric-number {
  font-family: var(--font-mono);
  font-size: clamp(38px, 5vw, 56px);
  font-weight: 800;
  line-height: 1;
  background: linear-gradient(145deg, var(--neon) 20%, #E7FFF6 80%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 6px;
  letter-spacing: -0.03em;
}

.metric-label {
  font-size: 15px;
  color: var(--txt-light);
  font-weight: 500;
}

.metric-sub {
  font-size: 13px;
  color: var(--muted);
  margin-top: 5px;
}

/* ===== 场景演示 ===== */
.scenario {
  background: linear-gradient(180deg, var(--bg-2), var(--bg));
}

.scenario-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.scenario-copy .section-head {
  margin-bottom: 34px;
}

.steps {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.step-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 18px 22px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line);
  border-radius: 16px;
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}

.step-item:hover {
  border-color: rgba(73, 232, 180, 0.3);
  background: rgba(73, 232, 180, 0.04);
  transform: translateX(4px);
}

.step-num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(73, 232, 180, 0.12);
  border: 1px solid rgba(73, 232, 180, 0.4);
  color: var(--neon);
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px rgba(73, 232, 180, 0.1);
}

.step-body h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
  line-height: 1.4;
}

.step-body p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.scenario-panel {
  position: relative;
}

.terminal-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow-hover);
  overflow: hidden;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  background: rgba(0, 0, 0, 0.25);
  border-bottom: 1px solid var(--line);
}

.terminal-bar i {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--accent);
}

.terminal-bar i:nth-child(2) {
  background: var(--warm);
}

.terminal-bar i:nth-child(3) {
  background: var(--neon);
}

.terminal-bar span {
  margin-left: auto;
  font-size: 12px;
  color: var(--muted);
  font-family: var(--font-mono);
}

.terminal-body {
  padding: 26px;
  min-height: 280px;
  background-image: linear-gradient(rgba(73, 232, 180, 0.02) 1px, transparent 1px);
  background-size: 32px 32px;
}

.terminal-line {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--txt-light);
  line-height: 1.5;
}

.terminal-line .prompt {
  color: var(--neon);
}

.terminal-line .label {
  color: var(--muted);
  flex-shrink: 0;
}

.terminal-tag {
  display: inline-block;
  background: rgba(73, 232, 180, 0.1);
  border: 1px solid rgba(73, 232, 180, 0.2);
  color: var(--neon);
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 12px;
  font-family: var(--font-sans);
  margin-right: 6px;
}

.terminal-progress {
  margin-top: 26px;
}

.terminal-progress .t-label {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 8px;
}

/* ===== 口碑 ===== */
.social-proof {
  padding-bottom: 100px;
}

.proof-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
  margin-bottom: 56px;
}

.quote-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 34px;
  position: relative;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.quote-card:hover {
  transform: translateY(-4px);
  border-color: rgba(73, 232, 180, 0.3);
  box-shadow: var(--shadow-hover);
}

.quote-card::before {
  content: "“";
  position: absolute;
  top: 8px;
  right: 26px;
  font-size: 88px;
  color: rgba(73, 232, 180, 0.12);
  line-height: 1;
  font-family: Georgia, serif;
}

.quote-card .stars {
  color: var(--warm);
  font-size: 14px;
  letter-spacing: 3px;
  margin-bottom: 14px;
}

.quote-card blockquote {
  font-size: 16px;
  color: var(--txt-light);
  line-height: 1.85;
  margin-bottom: 28px;
  max-width: 90%;
}

.quote-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(145deg, var(--neon-soft), rgba(255, 255, 255, 0.03));
  border: 1px solid rgba(73, 232, 180, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  color: var(--neon);
  flex-shrink: 0;
}

.quote-author strong {
  display: block;
  font-size: 15px;
}

.quote-author span {
  font-size: 13px;
  color: var(--muted);
}

.proof-cta-row {
  text-align: center;
  margin-top: 44px;
}

/* ===== 更新动态 ===== */
.news-wrap {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
}

.news-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 44px;
  align-items: start;
}

.news-list {
  display: flex;
  flex-direction: column;
}

.news-item {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  transition: padding-left 0.25s ease;
}

.news-item:first-child {
  padding-top: 0;
}

.news-item:hover {
  padding-left: 6px;
}

.news-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--neon);
  width: 40px;
  flex-shrink: 0;
  opacity: 0.6;
}

.news-main {
  flex: 1;
}

.news-meta {
  font-size: 12px;
  color: var(--muted);
  font-family: var(--font-mono);
  display: flex;
  gap: 12px;
  margin-bottom: 4px;
}

.news-item h3 {
  font-size: 18px;
  font-weight: 650;
  line-height: 1.5;
  color: var(--txt);
  margin-bottom: 4px;
  transition: color 0.2s ease;
}

.news-item:hover h3 {
  color: var(--neon);
}

.news-desc {
  font-size: 14px;
  color: var(--muted);
  max-width: 560px;
} 

.news-arrow {
  color: var(--muted);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.3s ease, transform 0.3s ease, color 0.3s ease;
  font-size: 20px;
}

.news-item:hover .news-arrow {
  opacity: 1;
  transform: translateX(0);
  color: var(--neon);
}

.news-side {
  position: sticky;
  top: 100px;
}

.side-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 22px;
}

.side-card .side-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 0;
}

.side-body {
  padding: 24px;
}

.side-body h4 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.4;
}

.side-body p {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 16px;
  line-height: 1.7;
}

.link-list {
  display: flex;
  flex-direction: column;
}

.link-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 2px;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  color: var(--txt-light);
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.link-list a:last-child {
  border-bottom: none;
}

.link-list a:hover {
  color: var(--neon);
  padding-left: 6px;
}

.link-list .arrow {
  font-size: 13px;
  color: var(--muted);
}

/* ===== FAQ ===== */
.faq-wrap {
  background: var(--bg);
}

.faq-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 60px;
  align-items: start;
}

.faq-head .section-head {
  margin-bottom: 30px;
}

.faq-head-note {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
  font-size: 14px;
  color: var(--muted);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  overflow: hidden;
  transition: border-color 0.25s ease;
}

.faq-item[open] {
  border-color: rgba(73, 232, 180, 0.35);
}

.faq-item summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 650;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  transition: background 0.25s ease;
  min-height: 56px;
  user-select: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary:hover {
  background: rgba(73, 232, 180, 0.04);
}

.faq-item summary::after {
  content: "+";
  font-size: 25px;
  font-weight: 300;
  color: var(--neon);
  transition: transform 0.3s ease;
  line-height: 1;
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item[open] summary {
  color: var(--neon);
}

.faq-item .answer {
  padding: 0 24px 22px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
  border-top: 1px solid transparent;
}

.faq-item[open] .answer {
  border-top-color: var(--line);
  padding-top: 16px;
}

/* ===== CTA 横条 ===== */
.cta-banner {
  background: var(--surface);
  border: 1px solid rgba(73, 232, 180, 0.3);
  border-radius: 24px;
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow);
}

.cta-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(600px 220px at 15% 0%, rgba(73, 232, 180, 0.08), transparent),
    url('/assets/images/backpic/back-5.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.25;
}

.cta-inner {
  position: relative;
  padding: 66px 60px;
  text-align: center;
  z-index: 2;
}

.cta-inner h2 {
  font-size: clamp(28px, 4.5vw, 44px);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
}

.cta-inner p {
  max-width: 620px;
  margin: 0 auto 32px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.newsletter-form {
  display: flex;
  max-width: 440px;
  margin: 0 auto;
  gap: 10px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.04);
  border-radius: 999px;
  padding: 6px 6px 6px 22px;
  transition: border-color 0.25s ease;
}

.newsletter-form:focus-within {
  border-color: var(--neon);
  box-shadow: 0 0 0 3px rgba(73, 232, 180, 0.1);
}

.newsletter-form input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--txt);
  font-size: 15px;
  min-width: 0;
}

.newsletter-form input::placeholder {
  color: #667080;
}

.form-tip {
  font-size: 13px;
  color: var(--muted);
  margin-top: 16px;
}

.form-success {
  display: none;
  margin-top: 18px;
  color: var(--neon);
  font-size: 15px;
  font-weight: 600;
}

/* ===== footer ===== */
.site-footer {
  background: #080A0E;
  border-top: 1px solid var(--line);
  padding: 80px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 64px;
}

.footer-brand .brand {
  margin-bottom: 18px;
}

.footer-brand p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
  max-width: 320px;
}

.footer-cols h4 {
  font-size: 15px;
  color: var(--txt);
  font-weight: 650;
  padding-bottom: 14px;
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-cols ul li {
  margin-bottom: 10px;
}

.footer-cols ul a {
  color: var(--muted);
  font-size: 14px;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-cols ul a:hover {
  color: var(--neon);
  padding-left: 4px;
}

.footer-contact {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line);
  padding: 16px;
  border-radius: 14px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}

.footer-contact span {
  color: var(--txt-light);
  font-weight: 600;
}

.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  color: #5B6470;
  font-size: 13px;
}

.footer-bottom a {
  color: #767F8F;
}

.footer-bottom a:hover {
  color: var(--neon);
}

/* ===== 底部固定条 ===== */
.bottom-convert-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 90;
  background: rgba(20, 25, 32, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid rgba(73, 232, 180, 0.28);
  padding: 12px 0;
  transform: translateY(110%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.bottom-convert-bar.bar-visible {
  transform: translateY(0);
}

.bottom-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.bottom-bar-text {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--txt-light);
  font-size: 14px;
}

.bottom-bar-text i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 12px var(--neon-glow);
  flex-shrink: 0;
}

.bottom-bar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.bar-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  color: var(--muted);
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s ease, color 0.2s ease;
  flex-shrink: 0;
}

.bar-close:hover {
  border-color: rgba(245, 94, 140, 0.5);
  color: var(--accent);
}

body.has-bar {
  padding-bottom: 52px;
}

/* ===== responsive ===== */
@media (prefers-reduced-motion: no-preference) {
  .hero h1,
  .hero-lead,
  .hero-ctas,
  .hero-stats {
    animation: fadeUp 0.7s ease both;
  }

  .hero-lead {
    animation-delay: 0.08s;
  }

  .hero-ctas {
    animation-delay: 0.16s;
  }

  .hero-stats {
    animation-delay: 0.24s;
  }

  .hero-visual {
    animation: fadeUp 0.8s ease both;
    animation-delay: 0.12s;
  }

  .feature-card {
    animation: fadeUp 0.55s ease both;
  }
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001s !important;
    transition-duration: 0.001s !important;
  }
  html {
    scroll-behavior: auto;
  }
}

/* 1024px */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 68px;
  }

  .hero h1 {
    font-size: 44px;
  }

  .feature-grid {
    grid-template-columns: 1fr 1fr;
  }

  .feature-wide {
    grid-column: auto;
    grid-template-columns: 1fr;
  }

  .feature-wide .fe-text {
    padding: 30px;
  }

  .metrics-bg {
    grid-template-columns: repeat(3, 1fr);
    padding: 40px 28px;
  }

  .scenario-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .news-layout {
    grid-template-columns: 1fr;
  }

  .news-side {
    position: static;
  }

  .faq-layout {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

/* 768px */
@media (max-width: 768px) {
  .section {
    padding: 72px 0;
  }

  .hero {
    padding: 140px 0 72px;
  }

  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: 260px;
    flex-direction: column;
    align-items: flex-start;
    background: rgba(10, 12, 16, 0.98);
    border-left: 1px solid var(--line);
    padding: 90px 30px 40px;
    gap: 8px;
    transform: translateX(110%);
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 109;
  }

  .main-nav.open {
    transform: translateX(0);
    box-shadow: -20px 0 60px rgba(0, 0, 0, 0.5);
  }

  .main-nav a {
    font-size: 18px;
    padding: 10px 0;
    width: 100%;
  }

  .main-nav a.active::after {
    width: 34px;
  }

  .header-cta {
    margin-right: 10px;
  }

  .nav-toggle {
    display: flex;
    width: 44px;
    height: 44px;
    border: 1px solid var(--line-strong);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.02);
    z-index: 110;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    margin-left: 4px;
    cursor: pointer;
    flex-shrink: 0;
  }

  .nav-toggle span {
    width: 18px;
    height: 2px;
    background: var(--txt);
    border-radius: 2px;
    transition: transform 0.3s ease, width 0.3s ease, background 0.3s ease;
  }

  .nav-toggle.open span:first-child {
    transform: translateY(7px) rotate(45deg);
    background: var(--neon);
  }

  .nav-toggle.open span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.open span:last-child {
    transform: translateY(-7px) rotate(-45deg);
    background: var(--neon);
  }

  .header-inner {
    height: 64px;
  }

  .site-header.scrolled .header-inner {
    height: 56px;
  }

  .nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(2px);
    z-index: 104;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }

  .nav-overlay.show {
    opacity: 1;
    pointer-events: auto;
  }

  .stacked-features {
    grid-template-columns: 1fr;
  }

  .metrics-bg {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 34px 28px;
  }

  .metrics-item {
    border-left: none;
    padding-left: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.09);
    padding-bottom: 18px;
  }

  .metrics-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }

  .proof-grid {
    grid-template-columns: 1fr;
  }

  .quote-card {
    padding: 28px;
  }

  .cta-inner {
    padding: 44px 24px;
  }

  .news-letter-form {
    flex-direction: column;
    border-radius: 22px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .countdown-card {
    right: 8px;
    bottom: -16px;
  }
}

/* 520px */
@media (max-width: 520px) {
  .container {
    width: calc(100% - 32px);
  }

  .hero-inner {
    gap: 56px;
  }

  .hero h1 {
    font-size: 33px;
  }

  .hero-lead {
    font-size: 15px;
  }

  .hero-ctas {
    flex-direction: column;
  }

  .hero-ctas .btn {
    width: 100%;
  }

  .hero-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .hero-stats li {
    padding: 12px 14px;
    min-width: 0;
  }

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

  .feature-card {
    padding: 26px 20px;
  }

  .feature-card h3 {
    font-size: 20px;
  }

  .feature-wide .fe-text {
    padding: 24px 20px;
  }

  .stage-main {
    padding: 22px 20px;
  }

  .stage-main .stage-title {
    font-size: 20px;
  }

  .stage-list li {
    font-size: 13px;
  }

  .countdown-card {
    position: relative;
    right: auto;
    bottom: auto;
    margin: 16px 14px 14px;
    min-width: auto;
  }

  .countdown-hint {
    display: none;
  }

  .step-item {
    flex-direction: column;
    gap: 10px;
  }

  .step-num {
    width: 34px;
    height: 34px;
  }

  .cta-inner h2 {
    font-size: 27px;
  }

  .newsletter-form {
    flex-direction: column;
    align-items: stretch;
    border-radius: 20px;
  }

  .newsletter-form .btn {
    width: 100%;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .footer-brand p {
    max-width: 100%;
  }

  .bottom-bar-inner {
    padding: 0 16px;
    gap: 10px;
  }

  .bottom-bar-text {
    font-size: 13px;
    line-height: 1.4;
  }

  .bottom-bar-text .bar-hide-mobile {
    display: none;
  }

  .bottom-bar-actions .btn {
    padding: 9px 14px;
    font-size: 13px;
  }

  .bottom-bar-actions .bar-close {
    width: 28px;
    height: 28px;
  }
}

/* roulang page: category1 */
:root {
  --bg: #0A0C10;
  --bg-2: #12151B;
  --surface: #161B23;
  --surface-2: #1D232E;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.14);
  --neon: #49E8B4;
  --neon-soft: rgba(73, 232, 180, 0.14);
  --neon-glow: rgba(73, 232, 180, 0.4);
  --accent: #F55E8C;
  --warm: #F6C85F;
  --txt: #E9ECF1;
  --muted: #8A93A2;
  --txt-light: #C7CEDA;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 24px 60px rgba(0, 0, 0, 0.45);
  --max-w: 1200px;
  --font-sans: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Inter", Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--txt);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 52px 52px;
  pointer-events: none;
}

::selection {
  background: rgba(73, 232, 180, 0.25);
  color: #fff;
}

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

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

button,
input,
select {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  color: inherit;
}

ul {
  list-style: none;
}

:where(a, button, summary, input, select, [tabindex]):focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
  border-radius: 6px;
}

.container {
  width: min(var(--max-w), calc(100% - 48px));
  margin: 0 auto;
}

.section {
  padding: 104px 0;
  position: relative;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  clip: rect(0 0 0 0);
  overflow: hidden;
  white-space: nowrap;
}

.eyebrow,
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--neon);
  font-size: 13px;
  letter-spacing: 0.08em;
  font-family: var(--font-mono);
  text-transform: uppercase;
  margin-bottom: 14px;
  background: var(--neon-soft);
  border: 1px solid rgba(73, 232, 180, 0.18);
  padding: 6px 15px;
  border-radius: 999px;
}

.text-gradient {
  background: linear-gradient(135deg, var(--neon) 0%, #79F5D2 60%, var(--warm) 130%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  min-height: 44px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
  border: 1px solid transparent;
}

.btn-sm {
  padding: 9px 18px;
  font-size: 14px;
  min-height: 38px;
}

.btn-primary {
  background: linear-gradient(145deg, #5CF0C2, #38CEA0);
  color: #08120E;
  box-shadow: 0 0 18px rgba(73, 232, 180, 0.22), 0 4px 16px rgba(0, 0, 0, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(145deg, #7CF5D0, #4FD9AE);
  box-shadow: 0 0 30px rgba(73, 232, 180, 0.38);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 0 12px rgba(73, 232, 180, 0.22);
}

.btn-ghost {
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.02);
  color: var(--txt-light);
}

.btn-ghost:hover {
  border-color: var(--neon);
  color: var(--neon);
  box-shadow: 0 0 20px rgba(73, 232, 180, 0.16);
  transform: translateY(-2px);
}

.btn-ghost:active {
  transform: translateY(0);
}

.btn-overdark {
  background: #fff;
  color: #0B0E13;
}

.btn-overdark:hover {
  background: #E8FFF6;
  box-shadow: 0 0 24px rgba(73, 232, 180, 0.18);
  transform: translateY(-2px);
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(10, 12, 16, 0.74);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.site-header.scrolled {
  background: rgba(10, 12, 16, 0.92);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 20px;
  transition: height 0.3s ease;
}

.site-header.scrolled .header-inner {
  height: 62px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--txt);
  flex-shrink: 0;
  line-height: 1.1;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(145deg, rgba(73, 232, 180, 0.22), rgba(73, 232, 180, 0.05));
  border: 1px solid rgba(73, 232, 180, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neon);
  box-shadow: 0 0 24px rgba(73, 232, 180, 0.15);
}

.brand-mark svg {
  width: 18px;
  height: 18px;
}

.brand small {
  display: block;
  font-size: 11px;
  color: var(--muted);
  font-weight: 400;
  letter-spacing: 0.04em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-left: auto;
}

.main-nav a {
  position: relative;
  font-size: 15px;
  color: #C3CAD4;
  padding: 10px 0;
  font-weight: 500;
  transition: color 0.25s ease;
}

.main-nav a:hover {
  color: #fff;
}

.main-nav a.active {
  color: #fff;
  text-shadow: 0 0 12px rgba(73, 232, 180, 0.35);
}

.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--neon);
  box-shadow: 0 0 10px var(--neon-glow), 0 0 22px rgba(73, 232, 180, 0.3);
}

.header-cta {
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  cursor: pointer;
}

.nav-toggle span {
  height: 2px;
  background: var(--txt-light);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== 分类页 Hero ===== */
.category-hero {
  position: relative;
  padding: 172px 0 86px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.category-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(640px 300px at 82% 28%, rgba(73, 232, 180, 0.12), transparent 70%),
    radial-gradient(500px 300px at 8% 70%, rgba(245, 94, 140, 0.07), transparent 70%),
    url("/assets/images/backpic/back-4.jpg") center/cover no-repeat;
  opacity: 0.4;
}

.category-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(180deg, rgba(10, 12, 16, 0.72) 0%, rgba(10, 12, 16, 0.94) 100%);
}

.category-hero .container {
  position: relative;
  z-index: 2;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 34px;
  font-size: 14px;
  color: var(--muted);
}

.breadcrumb a {
  transition: color 0.2s ease;
}

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

.crumb-sep {
  color: rgba(255, 255, 255, 0.25);
}

.cat-heading {
  max-width: 840px;
}

.hero-chip {
  display: inline-block;
  background: var(--neon-soft);
  border: 1px solid rgba(73, 232, 180, 0.22);
  color: var(--neon);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 13px;
  letter-spacing: 0.04em;
  font-family: var(--font-mono);
  margin-bottom: 22px;
}

.category-hero h1 {
  font-size: clamp(36px, 6vw, 62px);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: #fff;
}

.hero-lead {
  margin-top: 22px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--txt-light);
  max-width: 720px;
}

.cat-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin-top: 42px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.cat-meta-row .meta-item {
  display: flex;
  align-items: center;
  gap: 10px;
}

.cat-meta-row .meta-item span {
  color: var(--muted);
  font-size: 13px;
}

.cat-meta-row .meta-item strong {
  color: var(--txt);
  font-size: 14px;
  font-weight: 600;
}

/* ===== 筛选工具条 ===== */
.toolbar-section {
  padding: 96px 0 24px;
  scroll-margin-top: 90px;
}

.toolbar-box {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.filter-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
  border: 1px solid var(--line);
  background: var(--bg-2);
  cursor: pointer;
  min-height: 38px;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.filter-chip:hover {
  color: var(--txt-light);
  border-color: rgba(255, 255, 255, 0.18);
}

.filter-chip.is-active {
  color: #08120E;
  font-weight: 700;
  background: linear-gradient(145deg, #5CF0C2, #38CEA0);
  border-color: transparent;
  box-shadow: 0 0 18px rgba(73, 232, 180, 0.2);
}

.result-sort {
  display: flex;
  align-items: center;
  gap: 14px;
}

.count-pill {
  display: inline-flex;
  align-items: baseline;
  gap: 5px;
  color: var(--muted);
  font-size: 13px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  padding: 6px 14px;
  border-radius: 999px;
}

.count-pill strong {
  font-size: 18px;
  color: var(--neon);
  font-family: var(--font-mono);
}

.sort-box {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-2);
  padding-left: 12px;
}

.sort-box select {
  appearance: none;
  background: transparent;
  padding: 8px 34px 8px 8px;
  font-size: 13px;
  color: var(--txt-light);
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%238A93A2' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}

/* ===== 内容卡片区 ===== */
.feature-section {
  padding: 70px 0 30px;
  scroll-margin-top: 84px;
}

.feature-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 42px;
}

.feature-head h2 {
  font-size: clamp(27px, 3.6vw, 36px);
  letter-spacing: -0.02em;
  font-weight: 800;
  line-height: 1.25;
  max-width: 640px;
}

.feature-head p {
  color: var(--muted);
  font-size: 15px;
  max-width: 400px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.tool-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  position: relative;
}

.tool-card:hover {
  transform: translateY(-6px);
  border-color: rgba(73, 232, 180, 0.45);
  box-shadow: var(--shadow-hover), 0 0 24px rgba(73, 232, 180, 0.08);
}

.card-media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg-2);
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.tool-card:hover .card-media img {
  transform: scale(1.04);
}

.card-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 12, 16, 0.02) 40%, rgba(10, 12, 16, 0.55) 100%);
}

.card-content {
  padding: 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-tag {
  align-self: flex-start;
  display: inline-block;
  background: var(--neon-soft);
  border: 1px solid rgba(73, 232, 180, 0.18);
  color: var(--neon);
  font-size: 12px;
  letter-spacing: 0.06em;
  border-radius: 999px;
  padding: 5px 13px;
  margin-bottom: 18px;
  font-family: var(--font-mono);
}

.card-tag.pink {
  background: rgba(245, 94, 140, 0.12);
  border-color: rgba(245, 94, 140, 0.2);
  color: #FF8BB0;
}

.card-content h3 {
  font-size: 22px;
  line-height: 1.45;
  font-weight: 800;
  letter-spacing: -0.015em;
  margin-bottom: 14px;
}

.card-content h3 a {
  transition: color 0.2s ease;
}

.card-content h3 a:hover {
  color: var(--neon);
}

.card-content p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
  flex: 1;
}

.card-foot {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 13px;
}

.card-link-icon {
  margin-left: auto;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  color: var(--txt-light);
  background: transparent;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.tool-card:hover .card-link-icon {
  background: var(--neon);
  color: #08120E;
  border-color: var(--neon);
}

/* ===== 中间引导横幅 ===== */
.cta-banner-one {
  margin: 64px auto 60px;
  padding: 0 24px;
  max-width: 1200px;
  position: relative;
}

.banner-inner {
  background:
    linear-gradient(120deg, rgba(73, 232, 180, 0.1), transparent 55%),
    url("/assets/images/backpic/back-6.jpg") center/cover no-repeat,
    var(--surface);
  border: 1px solid rgba(73, 232, 180, 0.18);
  border-radius: var(--radius-lg);
  padding: 42px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  position: relative;
  overflow: hidden;
}

.banner-inner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(10, 12, 16, 0.72), rgba(10, 12, 16, 0.18));
  pointer-events: none;
}

.banner-main {
  position: relative;
  z-index: 1;
}

.banner-main h2 {
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.banner-main p {
  color: var(--txt-light);
  font-size: 15px;
  max-width: 620px;
}

.banner-actions {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}

/* ===== 编号索引列表 ===== */
.index-band {
  padding: 28px 0 76px;
}

.index-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-top: 34px;
}

.index-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 8px;
}

.index-head h2 {
  font-size: clamp(25px, 3.4vw, 34px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.index-grid-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  gap: 22px;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.index-grid-item:hover {
  transform: translateY(-4px);
  border-color: rgba(73, 232, 180, 0.4);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.4);
}

.index-number {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--neon);
  border: 1px solid rgba(73, 232, 180, 0.25);
  border-radius: 8px;
  padding: 3px 8px;
  height: fit-content;
  flex-shrink: 0;
}

.index-body h3 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.55;
  margin-bottom: 8px;
}

.index-body h3 a:hover {
  color: var(--neon);
}

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

/* ===== 分页器 ===== */
.pagination-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  padding: 58px 0 72px;
  flex-wrap: wrap;
}

.page-count {
  color: var(--muted);
  font-size: 14px;
}

.pager {
  display: flex;
  gap: 8px;
}

.page-link {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid var(--line);
  color: var(--muted);
  background: var(--surface);
  transition: color 0.2s ease, border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.page-link:hover:not(.current) {
  color: var(--neon);
  border-color: rgba(73, 232, 180, 0.4);
  transform: translateY(-2px);
}

.page-link.current {
  background: linear-gradient(145deg, #5CF0C2, #38CEA0);
  color: #08120E;
  border-color: transparent;
  font-weight: 700;
  box-shadow: 0 0 16px rgba(73, 232, 180, 0.2);
  cursor: default;
}

/* ===== FAQ ===== */
.faq-band {
  padding: 84px 0 96px;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(18, 21, 27, 0.5), rgba(10, 12, 16, 0.2));
}

.faq-inner {
  max-width: 860px;
  margin: 0 auto;
}

.faq-inner h2 {
  font-size: clamp(28px, 4vw, 38px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 18px;
  text-align: center;
}

.faq-inner .faq-sub {
  color: var(--muted);
  text-align: center;
  margin-bottom: 48px;
}

.faq-list {
  border-top: 1px solid var(--line);
}

.faq-item {
  border-bottom: 1px solid var(--line);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 6px;
  font-size: 17px;
  font-weight: 650;
  cursor: pointer;
  list-style: none;
  color: var(--txt);
  transition: color 0.2s ease, padding-left 0.25s ease;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary:hover {
  color: var(--neon);
  padding-left: 10px;
}

.faq-icon {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid var(--line);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--muted);
  transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.faq-icon svg {
  width: 13px;
  height: 13px;
}

.faq-item[open] summary {
  color: var(--neon);
  font-weight: 700;
}

.faq-item[open] .faq-icon {
  transform: rotate(45deg);
  background: var(--neon);
  color: #08120E;
  border-color: var(--neon);
}

.faq-answer {
  padding: 0 8px 26px 8px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
  max-width: 720px;
  animation: faqFade 0.3s ease;
}

@keyframes faqFade {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== 底部 CTA ===== */
.cta-band {
  padding: 0 0 100px;
}

.cta-panel {
  background:
    radial-gradient(700px 240px at 78% 0%, rgba(73, 232, 180, 0.12), transparent 60%),
    radial-gradient(500px 220px at 0% 100%, rgba(245, 94, 140, 0.08), transparent 60%),
    var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  position: relative;
  overflow: hidden;
  padding: 64px;
  text-align: center;
}

.cta-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(135deg, rgba(73, 232, 180, 0.06) 1px, transparent 1px),
    linear-gradient(45deg, rgba(73, 232, 180, 0.04) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

.cta-panel h2 {
  position: relative;
  z-index: 1;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
}

.cta-panel p {
  position: relative;
  z-index: 1;
  color: var(--muted);
  max-width: 660px;
  margin: 0 auto 30px;
  font-size: 16px;
}

.cta-btns {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* ===== Footer ===== */
.site-footer {
  background: #0B0E12;
  border-top: 1px solid var(--line);
  padding: 76px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 52px;
}

.footer-brand .brand {
  margin-bottom: 18px;
}

.footer-brand>p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
  max-width: 330px;
}

.footer-cols h4 {
  font-size: 14px;
  color: #fff;
  margin-bottom: 18px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.footer-cols ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-cols a {
  color: var(--muted);
  font-size: 14px;
  transition: color 0.2s ease;
}

.footer-cols a:hover {
  color: var(--neon);
}

.footer-contact {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
  margin-top: 8px;
}

.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 26px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
  color: var(--muted);
  flex-wrap: wrap;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .feature-grid {
    gap: 20px;
  }

  .card-content {
    padding: 24px;
  }

  .card-content h3 {
    font-size: 19px;
  }

  .banner-inner {
    padding: 38px 30px;
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 860px) {
  .main-nav {
    position: fixed;
    top: 72px;
    right: 16px;
    left: 16px;
    z-index: 99;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 14px;
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
  }

  .main-nav.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .main-nav a {
    display: block;
    padding: 14px 12px;
    border-radius: 10px;
    border-bottom: 1px solid var(--line);
  }

  .main-nav a:last-child {
    border-bottom: none;
  }

  .main-nav a.active::after {
    content: none;
  }

  .main-nav a.active {
    color: var(--neon);
    background: var(--neon-soft);
  }

  .nav-toggle {
    display: inline-flex;
  }

  .header-cta {
    display: none;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 64px 0;
  }

  .category-hero {
    padding: 132px 0 56px;
  }

  .category-hero h1 {
    font-size: clamp(30px, 9vw, 42px);
  }

  .hero-lead {
    font-size: 15px;
  }

  .toolbar-section {
    padding-top: 52px;
  }

  .toolbar-box {
    padding: 16px;
    align-items: stretch;
    flex-direction: column;
  }

  .result-sort {
    justify-content: space-between;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .feature-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 28px;
  }

  .index-grid {
    grid-template-columns: 1fr;
  }

  .index-grid-item {
    padding: 22px;
  }

  .cta-panel {
    padding: 40px 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 34px;
    padding-bottom: 36px;
  }

  .footer-cols h4 {
    margin-bottom: 12px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    justify-content: center;
  }

  .cat-meta-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .filter-group {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
  }

  .filter-chip {
    flex-shrink: 0;
  }
}

@media (max-width: 520px) {
  .container {
    width: calc(100% - 32px);
  }

  .banner-inner {
    padding: 30px 20px;
  }

  .card-content {
    padding: 20px;
  }

  .card-media {
    aspect-ratio: 4 / 3;
  }

  .banner-actions .btn {
    width: 100%;
  }

  .cta-btns .btn {
    width: 100%;
  }

  .pagination-wrap {
    gap: 18px;
  }

  .page-count {
    width: 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}