/* 溯言 SoChat - 酷炫视差官网 */

:root {
  --color-bg: #050810;
  --color-bg-2: #0a0f1a;
  --color-bg-card: rgba(15, 23, 42, 0.6);
  --color-text: #f1f5f9;
  --color-text-muted: #94a3b8;
  --color-primary: #3b82f6;
  --color-primary-glow: rgba(59, 130, 246, 0.5);
  --color-secondary: #8b5cf6;
  --color-secondary-glow: rgba(139, 92, 246, 0.5);
  --color-accent: #06b6d4;
  --color-success: #10b981;
  --color-danger: #ef4444;
  --color-border: rgba(255, 255, 255, 0.08);
  --font: 'Noto Sans SC', system-ui, sans-serif;
  --radius: 20px;
  --radius-sm: 12px;
  --radius-lg: 32px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --spotlight-size: 400px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
  cursor: default;
}

/* ===== Background Effects ===== */
.bg-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.cursor-glow {
  position: fixed;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--color-primary-glow) 0%, transparent 60%);
  border-radius: 50%;
  pointer-events: none;
  opacity: 0.1;
  transform: translate(-50%, -50%);
  z-index: 1;
  transition: opacity 0.3s;
  mix-blend-mode: screen;
}

/* 触摸设备不显示光标跟随效果 */
@media (hover: none) and (pointer: coarse) {
  .cursor-glow {
    display: none !important;
  }
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: all var(--transition);
}

.header.scrolled {
  padding: 12px 0;
  background: rgba(5, 8, 16, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--color-text);
}

.logo-img {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  object-fit: contain;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.logo-sub {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--color-text-muted);
  margin-left: 8px;
  letter-spacing: 1px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  transition: all var(--transition);
  position: relative;
}

.nav-links a:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.05);
}

.nav-demo {
  color: var(--color-primary) !important;
  font-weight: 500;
}

.nav-cta {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary)) !important;
  color: #fff !important;
  padding: 10px 24px !important;
  font-weight: 600;
}

.nav-cta:hover {
  box-shadow: 0 0 30px var(--color-primary-glow);
  transform: translateY(-2px);
}

/* ===== Language Switcher ===== */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 8px;
}

.lang-btn {
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  font-family: inherit;
}

.lang-btn:hover {
  color: var(--color-text);
}

.lang-btn.active {
  color: var(--color-primary);
  font-weight: 600;
}

.lang-divider {
  color: var(--color-text-muted);
  opacity: 0.5;
  font-size: 0.8rem;
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 120px 40px 80px;
  overflow: hidden;
}

.hero-content {
  text-align: center;
  position: relative;
  z-index: 10;
  max-width: 900px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--color-primary);
  margin-bottom: 32px;
  backdrop-filter: blur(10px);
}

.badge-dot {
  width: 6px;
  height: 6px;
  background: var(--color-success);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--color-success);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero-title {
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.title-wrapper {
  position: relative;
  overflow: hidden;
}

.title-line {
  display: block;
  font-size: clamp(4rem, 12vw, 7rem);
  font-weight: 900;
  line-height: 1.1;
  background: linear-gradient(180deg, #fff 0%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -2px;
}

.title-en {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 600;
  letter-spacing: 0.2em;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-transform: uppercase;
}

/* Glitch Effect */
.glitched {
  position: relative;
}

.glitched::before,
.glitched::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.8;
}

.glitched::before {
  color: var(--color-secondary);
  z-index: -1;
  animation: glitch-effect-1 3s infinite linear alternate-reverse;
}

.glitched::after {
  color: var(--color-accent);
  z-index: -2;
  animation: glitch-effect-2 2s infinite linear alternate-reverse;
}

@keyframes glitch-effect-1 {
  0% { clip-path: inset(20% 0 80% 0); transform: translate(-2px, 1px); }
  20% { clip-path: inset(60% 0 10% 0); transform: translate(2px, -1px); }
  40% { clip-path: inset(40% 0 50% 0); transform: translate(-2px, 2px); }
  60% { clip-path: inset(80% 0 5% 0); transform: translate(2px, -2px); }
  80% { clip-path: inset(10% 0 70% 0); transform: translate(-1px, 1px); }
  100% { clip-path: inset(50% 0 30% 0); transform: translate(1px, -1px); }
}

@keyframes glitch-effect-2 {
  0% { clip-path: inset(10% 0 60% 0); transform: translate(2px, -1px); }
  20% { clip-path: inset(80% 0 5% 0); transform: translate(-2px, 2px); }
  40% { clip-path: inset(30% 0 20% 0); transform: translate(1px, -2px); }
  60% { clip-path: inset(15% 0 80% 0); transform: translate(-1px, 2px); }
  80% { clip-path: inset(55% 0 10% 0); transform: translate(2px, 1px); }
  100% { clip-path: inset(40% 0 30% 0); transform: translate(-2px, -1px); }
}

.hero-slogan {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 24px;
  height: 1.5em; /* Prevent layout shift */
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-slogan::after {
  content: '|';
  animation: blink 1s infinite;
  margin-left: 4px;
  color: var(--color-primary);
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-bottom: 60px;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  padding: 32px 48px;
  background: var(--color-bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

.stat {
  text-align: center;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, #fff, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-plus {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-primary);
}

.stat-label {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 4px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: linear-gradient(180deg, transparent, var(--color-border), transparent);
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: var(--color-text-muted);
  font-size: 0.75rem;
  letter-spacing: 2px;
  opacity: 0.7;
}

.scroll-indicator {
  width: 20px;
  height: 32px;
  border: 2px solid var(--color-border);
  border-radius: 12px;
  position: relative;
}

.scroll-indicator::after {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 2px;
  animation: scroll-down 2s ease-in-out infinite;
}

@keyframes scroll-down {
  0% { top: 6px; opacity: 0; }
  20% { opacity: 1; }
  100% { top: 16px; opacity: 0; }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  border: none;
  cursor: pointer;
  font-family: inherit;
  z-index: 1;
}

.btn-glow {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  box-shadow: 0 0 20px var(--color-primary-glow);
}

.btn-glow:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 40px var(--color-primary-glow);
}

.btn-glow .btn-shine {
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  transform: skewX(-20deg);
  animation: shine 4s infinite;
}

@keyframes shine {
  0%, 50% { left: -100%; }
  60%, 100% { left: 200%; }
}

.btn-outline {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  background: rgba(59, 130, 246, 0.1);
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

.btn-lg {
  padding: 18px 40px;
  font-size: 1.1rem;
}

/* ===== Sections ===== */
.section {
  padding: 140px 0;
  position: relative;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
  position: relative;
  z-index: 10;
}

.section-header {
  text-align: center;
  margin-bottom: 80px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.2em;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  margin-bottom: 20px;
  color: var(--color-text);
}

.section-desc {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== Spotlight Cards ===== */
[data-spotlight] {
  position: relative;
  background: var(--color-bg-card);
  border-radius: var(--radius);
  border: 1px solid transparent; /* Border handled by ::before */
  overflow: hidden;
}

[data-spotlight]::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  padding: 1.5px; /* Border width */
  background: radial-gradient(
    var(--spotlight-size) circle at var(--x) var(--y),
    var(--color-primary-glow),
    transparent 40%
  );
  -webkit-mask: 
    linear-gradient(#fff 0 0) content-box, 
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

[data-spotlight]::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  background: radial-gradient(
    var(--spotlight-size) circle at var(--x) var(--y),
    rgba(59, 130, 246, 0.1),
    transparent 40%
  );
  pointer-events: none;
}

/* ===== Why Section ===== */
.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.why-card {
  padding: 40px;
  transition: transform var(--transition);
}

.why-card:hover {
  transform: translateY(-5px);
}

.card-content {
  position: relative;
  z-index: 2;
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 24px;
}

.card-icon-red {
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-danger);
  box-shadow: 0 0 20px rgba(239, 68, 68, 0.2);
}

.card-icon-green {
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.2);
}

.card-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
  color: var(--color-text-muted);
}

.why-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-text);
}

.why-card p {
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== Features Section ===== */
.section-features {
  background: var(--color-bg-2);
}

.features-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.feature-visual {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.visual-ring {
  position: absolute;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  animation: rotate 30s linear infinite;
}

.ring-1 { width: 100%; height: 100%; animation-duration: 40s; border-color: rgba(59, 130, 246, 0.2); }
.ring-2 { width: 70%; height: 70%; animation-duration: 30s; animation-direction: reverse; border-color: rgba(139, 92, 246, 0.2); }
.ring-3 { width: 40%; height: 40%; animation-duration: 20s; border-color: rgba(6, 182, 212, 0.2); }

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.visual-core {
  width: 140px;
  height: 140px;
  background: radial-gradient(circle at 30% 30%, #4f46e5, #0f172a);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  font-weight: 800;
  box-shadow: 0 0 60px var(--color-primary-glow), inset 0 0 20px rgba(255,255,255,0.2);
  z-index: 10;
  position: relative;
}

.visual-core::after {
  content: '';
  position: absolute;
  inset: -5px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  z-index: -1;
  filter: blur(10px);
  opacity: 0.5;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.feature-item:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--color-primary);
  transform: translateX(10px);
}

.feature-icon {
  font-size: 2rem;
  flex-shrink: 0;
  filter: drop-shadow(0 0 10px rgba(255,255,255,0.1));
}

.feature-content h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.feature-content p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* ===== Architecture Section ===== */
.arch-showcase {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}

.arch-card {
  background: var(--color-bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px 24px;
  text-align: center;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.arch-card:hover {
  transform: translateY(-10px);
  border-color: var(--color-primary);
  box-shadow: 0 20px 50px -20px var(--color-primary-glow);
}

.arch-value {
  font-size: 3.5rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 16px;
  filter: drop-shadow(0 0 20px var(--color-primary-glow));
}

.arch-value span {
  font-size: 1.5rem;
  color: var(--color-text);
  -webkit-text-fill-color: var(--color-text);
}

.arch-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.arch-card p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.arch-badges {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.arch-badge {
  padding: 10px 24px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  border-radius: 50px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: all var(--transition);
}

.arch-badge:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--color-text-muted);
  color: var(--color-text);
}

/* ===== Solutions Section ===== */
.section-solutions {
  background: var(--color-bg-2);
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.solution-card {
  background: var(--color-bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 48px 32px;
  position: relative;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}

.solution-card:hover {
  transform: translateY(-10px);
}

.solution-featured {
  border-color: var(--color-primary);
  background: linear-gradient(180deg, rgba(59, 130, 246, 0.1), var(--color-bg-card));
  box-shadow: 0 0 40px rgba(59, 130, 246, 0.1);
}

.solution-glow {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 150px;
  background: radial-gradient(circle at 50% 0%, var(--color-primary-glow), transparent 70%);
  opacity: 0.2;
  pointer-events: none;
}

.solution-badge {
  position: absolute;
  top: 20px;
  right: 20px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.solution-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.solution-desc {
  color: var(--color-text-muted);
  margin-bottom: 32px;
  line-height: 1.6;
  min-height: 50px;
}

.solution-list {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.solution-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 10px;
}

.solution-list li::before {
  content: '✓';
  color: var(--color-success);
  font-weight: bold;
}

.solution-list li:last-child {
  border-bottom: none;
}

.solution-target {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  padding: 12px;
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
  text-align: center;
}

/* ===== Security Section ===== */
.security-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.security-card {
  background: var(--color-bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  transition: all var(--transition);
}

.security-card:hover {
  border-color: var(--color-success);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(16, 185, 129, 0.1);
}

.security-icon {
  font-size: 3rem;
  margin-bottom: 24px;
  display: inline-block;
  filter: drop-shadow(0 0 15px rgba(255,255,255,0.1));
}

.security-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.security-card ul {
  list-style: none;
  text-align: left;
}

.security-card li {
  padding: 8px 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  padding-left: 20px;
  position: relative;
}

.security-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: var(--color-success);
  border-radius: 50%;
  box-shadow: 0 0 5px var(--color-success);
}

/* ===== Premium Modules Section ===== */
.section-premium {
  background: var(--color-bg-2);
  position: relative;
}

.premium-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 48px;
}

.premium-card {
  background: var(--color-bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px 32px;
  position: relative;
  transition: all var(--transition);
  overflow: hidden;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.premium-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  opacity: 0;
  transition: opacity var(--transition);
}

.premium-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-5px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.premium-card:hover::before {
  opacity: 1;
}

.premium-icon {
  font-size: 3rem;
  margin-bottom: 24px;
  display: inline-block;
  filter: drop-shadow(0 0 15px rgba(59, 130, 246, 0.3));
}

.premium-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-text);
}

.premium-card p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 24px;
  flex-grow: 1;
}

.premium-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-primary);
}

.premium-cta {
  text-align: center;
  padding: 40px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-top: 60px;
}

.premium-cta p {
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

/* ===== More Features Section ===== */
.section-more-features {
  background: var(--color-bg);
}

.more-features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.more-feature-item {
  background: var(--color-bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px 32px;
  text-align: center;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.more-feature-item:hover {
  border-color: var(--color-primary);
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.more-icon {
  font-size: 3rem;
  display: inline-block;
  margin-bottom: 20px;
  filter: drop-shadow(0 0 10px rgba(255,255,255,0.1));
}

.more-feature-item h4 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-text);
}

.more-feature-item p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ===== Industries Section ===== */
.industries-marquee {
  overflow: hidden;
  padding: 60px 0;
  background: var(--color-bg);
  position: relative;
}

.industries-marquee::before,
.industries-marquee::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 200px;
  z-index: 2;
  pointer-events: none;
}

.industries-marquee::before {
  left: 0;
  background: linear-gradient(90deg, var(--color-bg), transparent);
}

.industries-marquee::after {
  right: 0;
  background: linear-gradient(270deg, var(--color-bg), transparent);
}

.marquee-track {
  display: flex;
  gap: 40px;
  animation: marquee 40s linear infinite;
  width: max-content;
}

@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.industry-item {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 24px 48px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 2rem;
  transition: all var(--transition);
}

.industry-item:hover {
  border-color: var(--color-primary);
  background: rgba(255, 255, 255, 0.05);
}

.industry-item span {
  font-size: 1.1rem;
  font-weight: 600;
}

/* ===== CTA Section ===== */
.section-cta {
  background: var(--color-bg-2);
  position: relative;
  overflow: hidden;
  padding: 100px 0;
}

.cta-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 50% at 50% 100%, rgba(59, 130, 246, 0.15), transparent);
}

.cta-content {
  text-align: center;
  position: relative;
  z-index: 10;
  padding: 100px 40px;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(20px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 0 100px rgba(0,0,0,0.5);
  overflow: hidden;
}

.cta-content::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
}

.cta-content h2 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  margin-bottom: 24px;
  color: #fff;
}

.cta-content > p {
  color: var(--color-text-muted);
  font-size: 1.2rem;
  margin-bottom: 60px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-contacts {
  display: flex;
  justify-content: center;
  gap: 60px;
  margin-bottom: 60px;
}

.cta-contact {
  display: flex;
  align-items: center;
  gap: 16px;
}

.contact-icon {
  font-size: 2rem;
  filter: grayscale(1);
  transition: filter 0.3s;
}

.cta-contact:hover .contact-icon {
  filter: grayscale(0);
}

.contact-info {
  text-align: left;
}

.contact-label {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.contact-value {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
}

.cta-actions {
  display: flex;
  gap: 20px;
  justify-content: center;
}

/* ===== Footer ===== */
.footer {
  background: #020408;
  border-top: 1px solid var(--color-border);
  padding: 100px 0 40px;
}

.footer-main {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 100px;
  margin-bottom: 80px;
}

.footer-brand .logo {
  margin-bottom: 24px;
}

.footer-slogan {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  max-width: 300px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 24px;
  color: #fff;
}

.footer-col a {
  display: block;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: 10px 0;
  transition: all var(--transition);
  font-size: 0.95rem;
}

.footer-col a:hover {
  color: var(--color-primary);
  transform: translateX(5px);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 40px;
  border-top: 1px solid var(--color-border);
}

.footer-bottom p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.footer-legal {
  display: flex;
  gap: 32px;
}

.footer-legal a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.3s;
}

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

/* ===== Animations ===== */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-animate="slide-left"] {
  transform: translateX(-50px);
}

[data-animate="slide-right"] {
  transform: translateX(50px);
}

[data-animate="scale"] {
  transform: scale(0.9);
}

[data-animate="fade"] {
  transform: none;
  opacity: 0;
}

[data-animate].animated {
  opacity: 1;
  transform: none;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .why-grid, .features-showcase {
    grid-template-columns: 1fr;
  }
  
  .features-showcase {
    gap: 60px;
  }
  
  .feature-visual {
    max-width: 400px;
    margin: 0 auto;
  }
  
  .more-features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .arch-showcase, .security-grid, .premium-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .solutions-grid {
    grid-template-columns: 1fr;
    max-width: 600px;
    margin: 0 auto;
  }
  
  .cta-contacts {
    flex-direction: column;
    align-items: center;
    gap: 30px;
  }
  
  .footer-main {
    grid-template-columns: 1fr;
    gap: 60px;
  }
}

/* ===== Mobile Menu Overlay ===== */
.nav-overlay {
  display: none;
}

/* ===== Mobile Menu Toggle ===== */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  z-index: 1001;
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-primary);
}

.nav-toggle.active {
  border-color: var(--color-primary);
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}

.nav-toggle.active .nav-toggle-bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.nav-toggle.active .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active .nav-toggle-bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }
  
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(320px, 85vw);
    height: 100vh;
    background: rgba(5, 8, 16, 0.98);
    backdrop-filter: blur(20px);
    border-left: 1px solid var(--color-border);
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    padding: 100px 24px 40px;
    gap: 0;
    transition: right var(--transition);
    z-index: 1000;
    box-shadow: -20px 0 60px rgba(0, 0, 0, 0.5);
  }
  
  .nav-links.open {
    right: 0;
  }
  
  .nav-links a {
    padding: 16px 0;
    font-size: 1.1rem;
    border-bottom: 1px solid var(--color-border);
  }
  
  .nav-links a:last-of-type {
    border-bottom: none;
  }

  .lang-switcher {
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
    justify-content: center;
  }
  
  .nav-overlay {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    z-index: 999;
    pointer-events: none;
  }
  
  .nav-overlay.open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
  
  .nav-overlay.open {
    opacity: 1;
    visibility: visible;
  }
  
  .hero {
    padding: 100px 20px 60px;
  }
  
  .hero-desc br {
    display: none;
  }
  
  .hero-actions {
    flex-direction: column;
    gap: 16px;
    margin-bottom: 40px;
  }
  
  .hero-actions .btn {
    width: 100%;
    max-width: 280px;
  }
  
  .title-line {
    font-size: clamp(2.5rem, 15vw, 4rem);
  }
  
  .title-en {
    letter-spacing: 0.1em;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: 24px;
    padding: 24px 20px;
    width: 100%;
  }
  
  .stat-value {
    font-size: 2rem;
  }
  
  .stat-divider {
    width: 60px;
    height: 1px;
  }
  
  .section {
    padding: 60px 0;
  }
  
  .section-header {
    margin-bottom: 48px;
  }
  
  .container {
    padding: 0 20px;
  }
  
  .nav {
    padding: 0 20px;
  }
  
  .why-card {
    padding: 28px 24px;
  }
  
  .why-card h3 {
    font-size: 1.25rem;
  }
  
  .features-showcase {
    gap: 40px;
  }
  
  .feature-visual {
    max-width: 280px;
  }
  
  .visual-core {
    width: 100px;
    height: 100px;
    font-size: 1.25rem;
  }
  
  .feature-item {
    padding: 20px 16px;
    gap: 16px;
  }
  
  .feature-icon {
    font-size: 1.5rem;
  }
  
  .more-features-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .more-feature-item {
    padding: 28px 24px;
  }
  
  .arch-showcase,
  .security-grid,
  .premium-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .arch-card {
    padding: 28px 20px;
  }
  
  .arch-value {
    font-size: 2.5rem;
  }
  
  .arch-badges {
    gap: 12px;
  }
  
  .arch-badge {
    padding: 8px 16px;
    font-size: 0.8rem;
  }
  
  .solution-card {
    padding: 32px 24px;
  }
  
  .solution-card h3 {
    font-size: 1.25rem;
  }
  
  .premium-card {
    padding: 28px 24px;
  }
  
  .premium-card h3 {
    font-size: 1.1rem;
  }
  
  .premium-icon {
    font-size: 2.5rem;
  }
  
  .security-card {
    padding: 24px 20px;
  }
  
  .security-icon {
    font-size: 2.5rem;
  }
  
  .industries-marquee::before,
  .industries-marquee::after {
    width: 60px;
  }
  
  .industry-item {
    padding: 16px 28px;
    font-size: 1.5rem;
  }
  
  .industry-item span {
    font-size: 0.95rem;
  }
  
  .cta-content {
    padding: 48px 24px;
  }
  
  .cta-content > p {
    margin-bottom: 40px;
  }
  
  .cta-contacts {
    flex-direction: column;
    align-items: center;
    gap: 24px;
    margin-bottom: 40px;
  }
  
  .cta-actions {
    flex-direction: column;
    gap: 16px;
  }
  
  .cta-actions .btn {
    width: 100%;
    max-width: 280px;
  }
  
  .premium-cta {
    padding: 32px 24px;
    margin-top: 40px;
  }
  
  .footer {
    padding: 60px 0 32px;
  }
  
  .footer-main {
    grid-template-columns: 1fr;
    gap: 48px;
    margin-bottom: 48px;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
    padding-top: 32px;
  }
  
  .footer-legal {
    flex-direction: column;
    gap: 12px;
  }
}

/* 小屏手机适配 */
@media (max-width: 480px) {
  .hero {
    padding: 90px 16px 50px;
  }
  
  .hero-badge {
    font-size: 0.75rem;
    padding: 5px 12px;
  }
  
  .hero-slogan {
    font-size: 1.1rem;
  }
  
  .hero-desc {
    font-size: 0.95rem;
  }
  
  .section-tag {
    font-size: 0.7rem;
    letter-spacing: 0.15em;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .section-desc {
    font-size: 0.95rem;
  }
  
  .container {
    padding: 0 16px;
  }
  
  .nav {
    padding: 0 16px;
  }
  
  .logo-img {
    width: 40px;
    height: 40px;
  }
  
  .logo-text {
    font-size: 1.25rem;
  }
  
  .cta-content h2 {
    font-size: 1.5rem;
  }
  
  .contact-value {
    font-size: 1rem;
  }
}