:root {
  --color-primary: #e94560;
  --color-primary-dark: #c7304a;
  --color-primary-light: #ff7a59;
  --color-accent: #533483;
  --color-bg: #f7f8fc;
  --color-bg-alt: #eef1f8;
  --color-surface: #ffffff;
  --color-surface-glass: rgba(255, 255, 255, 0.65);
  --color-border: rgba(26, 26, 46, 0.1);
  --color-text: #1a1a2e;
  --color-text-soft: #4a4a68;
  --color-text-muted: #6b6b85;
  --color-heading: #16162a;
  --color-shadow: rgba(26, 26, 46, 0.08);
  --color-shadow-strong: rgba(26, 26, 46, 0.16);
  --gradient-hero: linear-gradient(135deg, #1a1a2e 0%, #16213e 45%, #0f3460 100%);
  --gradient-primary: linear-gradient(135deg, #e94560 0%, #ff7a59 100%);
  --gradient-soft: linear-gradient(135deg, rgba(233, 69, 96, 0.12) 0%, rgba(83, 52, 131, 0.12) 100%);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 30px;
  --space-xs: 0.5rem;
  --space-sm: 0.875rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4.5rem;
  --container: 1200px;
  --header-height: 72px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --transition-fast: 0.2s ease;
  --transition-base: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  --transition-slow: 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="dark"] {
  --color-bg: #0d0d1a;
  --color-bg-alt: #12122a;
  --color-surface: #1a1a30;
  --color-surface-glass: rgba(26, 26, 48, 0.65);
  --color-border: rgba(255, 255, 255, 0.1);
  --color-text: #e8e8f2;
  --color-text-soft: #b8b8cc;
  --color-text-muted: #8a8aa5;
  --color-heading: #ffffff;
  --color-shadow: rgba(0, 0, 0, 0.4);
  --color-shadow-strong: rgba(0, 0, 0, 0.6);
  --gradient-soft: linear-gradient(135deg, rgba(233, 69, 96, 0.18) 0%, rgba(83, 52, 131, 0.18) 100%);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg: #0d0d1a;
    --color-bg-alt: #12122a;
    --color-surface: #1a1a30;
    --color-surface-glass: rgba(26, 26, 48, 0.65);
    --color-border: rgba(255, 255, 255, 0.1);
    --color-text: #e8e8f2;
    --color-text-soft: #b8b8cc;
    --color-text-muted: #8a8aa5;
    --color-heading: #ffffff;
    --color-shadow: rgba(0, 0, 0, 0.4);
    --color-shadow-strong: rgba(0, 0, 0, 0.6);
    --gradient-soft: linear-gradient(135deg, rgba(233, 69, 96, 0.18) 0%, rgba(83, 52, 131, 0.18) 100%);
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 1rem);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image: radial-gradient(circle at 12% 8%, rgba(233, 69, 96, 0.08), transparent 40%),
    radial-gradient(circle at 88% 2%, rgba(83, 52, 131, 0.1), transparent 45%);
  background-attachment: fixed;
  transition: background-color var(--transition-base), color var(--transition-base);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--color-heading);
  line-height: 1.35;
  margin: 0 0 var(--space-sm);
  font-weight: 700;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(1.75rem, 4.2vw, 3rem);
}

h2 {
  font-size: clamp(1.5rem, 3.2vw, 2.25rem);
}

h3 {
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
}

h4 {
  font-size: 1.1rem;
  color: var(--color-text);
}

p {
  margin: 0 0 var(--space-md);
}

ul,
ol {
  margin: 0 0 var(--space-md);
  padding-left: 1.4rem;
}

li {
  margin-bottom: 0.4rem;
}

blockquote {
  margin: var(--space-md) 0;
  padding: var(--space-md) var(--space-lg);
  border-left: 4px solid var(--color-primary);
  background: var(--gradient-soft);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-text-soft);
  font-style: italic;
}

address {
  font-style: normal;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input,
textarea,
select {
  font-family: inherit;
  font-size: 1rem;
}

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

.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: 9999;
  padding: 0.75rem 1.5rem;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 1rem;
  color: #fff;
}

:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-surface-glass);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-base), background var(--transition-base);
}

.site-header.scrolled {
  box-shadow: 0 8px 30px var(--color-shadow);
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-md);
  height: var(--header-height);
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-shrink: 0;
  color: var(--color-heading);
}

.brand:hover {
  color: var(--color-heading);
}

.brand-logo {
  border-radius: 12px;
  box-shadow: 0 4px 14px rgba(233, 69, 96, 0.35);
  transition: transform var(--transition-base);
}

.brand:hover .brand-logo {
  transform: rotate(-6deg) scale(1.05);
}

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

.brand-text strong {
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.brand-text small {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

.main-nav {
  margin-left: auto;
}

.main-nav ul {
  display: flex;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav a {
  display: block;
  padding: 0.5rem 0.7rem;
  font-size: 0.9rem;
  color: var(--color-text-soft);
  border-radius: var(--radius-sm);
  position: relative;
  white-space: nowrap;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0.7rem;
  right: 0.7rem;
  bottom: 0.25rem;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--color-primary);
  background: var(--gradient-soft);
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after {
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}

.site-search {
  display: flex;
  align-items: center;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.25rem 0.35rem 0.25rem 0.9rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.site-search:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.15);
}

.site-search input {
  border: none;
  background: transparent;
  color: var(--color-text);
  width: 150px;
  padding: 0.35rem 0;
  font-size: 0.85rem;
}

.site-search input::placeholder {
  color: var(--color-text-muted);
}

.site-search input:focus {
  outline: none;
}

.site-search button {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  transition: transform var(--transition-fast), filter var(--transition-fast);
}

.site-search button:hover {
  transform: scale(1.08);
  filter: brightness(1.1);
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-soft);
  transition: transform var(--transition-base), color var(--transition-fast), border-color var(--transition-fast);
}

.theme-toggle:hover {
  transform: rotate(20deg) scale(1.05);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: 0 9px;
}

.menu-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface-glass);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  animation: slideDown 0.3s ease;
}

.mobile-menu ul {
  list-style: none;
  margin: 0;
  padding: var(--space-sm) var(--space-md);
  display: grid;
  gap: 0.15rem;
}

.mobile-menu a {
  display: block;
  padding: 0.7rem 0.8rem;
  border-radius: var(--radius-sm);
  color: var(--color-text-soft);
  font-size: 0.95rem;
}

.mobile-menu a:hover {
  background: var(--gradient-soft);
  color: var(--color-primary);
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.breadcrumb {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-md) var(--space-md) 0;
}

.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 0.4rem;
  color: var(--color-text-muted);
}

.breadcrumb a {
  color: var(--color-text-muted);
}

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

.breadcrumb [aria-current="page"] {
  color: var(--color-primary);
  font-weight: 600;
}

.hero {
  position: relative;
  margin: var(--space-md) var(--space-md) 0;
  border-radius: var(--radius-xl);
  background: var(--gradient-hero);
  overflow: hidden;
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 18% 20%, rgba(233, 69, 96, 0.35), transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(83, 52, 131, 0.45), transparent 50%),
    radial-gradient(circle at 60% 10%, rgba(15, 52, 96, 0.6), transparent 55%);
  z-index: -1;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 50% 40%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(circle at 50% 40%, #000 0%, transparent 75%);
  z-index: -1;
  opacity: 0.7;
}

.hero-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: clamp(2rem, 6vw, 4.5rem) clamp(1.25rem, 4vw, 3rem);
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
}

.hero-copy {
  color: #eef1f8;
}

.eyebrow {
  display: inline-block;
  padding: 0.35rem 1rem;
  margin-bottom: var(--space-md);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #ffd1da;
  background: rgba(233, 69, 96, 0.18);
  border: 1px solid rgba(233, 69, 96, 0.4);
  border-radius: 999px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.hero h1 {
  color: #ffffff;
  margin-bottom: var(--space-md);
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.hero-lead {
  color: rgba(238, 241, 248, 0.85);
  font-size: clamp(0.95rem, 1.5vw, 1.08rem);
  line-height: 1.9;
  max-width: 60ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin: var(--space-lg) 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 999px;
  border: 2px solid transparent;
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base), color var(--transition-fast);
  will-change: transform;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 10px 28px rgba(233, 69, 96, 0.35);
}

.btn-primary:hover {
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 16px 36px rgba(233, 69, 96, 0.45);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.btn-ghost:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.6);
  transform: translateY(-3px);
}

.hero-stats {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1rem, 3vw, 2.5rem);
  margin: 0;
  padding: var(--space-md) 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.hero-stats li {
  display: flex;
  flex-direction: column;
  margin: 0;
}

.hero-stats strong {
  font-size: clamp(1.4rem, 3vw, 2rem);
  color: #fff;
  line-height: 1.2;
  background: linear-gradient(135deg, #fff 0%, #ffb3c0 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-stats span {
  font-size: 0.8rem;
  color: rgba(238, 241, 248, 0.7);
  letter-spacing: 0.03em;
}

.hero-visual {
  position: relative;
  animation: floatY 6s ease-in-out infinite;
}

.hero-visual svg {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
}

@keyframes floatY {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-14px);
  }
}

.section {
  padding: var(--space-2xl) 0;
  position: relative;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section-head {
  max-width: 760px;
  margin: 0 auto var(--space-xl);
  text-align: center;
}

.section-head h2 {
  position: relative;
  display: inline-block;
  padding-bottom: 0.6rem;
}

.section-head h2::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 64px;
  height: 4px;
  border-radius: 4px;
  background: var(--gradient-primary);
}

.section-head p {
  color: var(--color-text-muted);
  font-size: 1.02rem;
  margin: var(--space-sm) 0 0;
}

.prose {
  max-width: 860px;
  margin: 0 auto;
  color: var(--color-text-soft);
}

.prose h3 {
  margin-top: var(--space-xl);
  padding-left: 0.9rem;
  border-left: 4px solid var(--color-primary);
}

.prose h4 {
  margin-top: var(--space-lg);
  color: var(--color-primary);
}

.prose p {
  text-align: justify;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.card {
  position: relative;
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 20px var(--color-shadow);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 44px var(--color-shadow-strong);
  border-color: rgba(233, 69, 96, 0.35);
}

.card:hover::before {
  transform: scaleX(1);
}

.card h3 {
  color: var(--color-heading);
  margin-bottom: var(--space-sm);
}

.card p {
  color: var(--color-text-soft);
  font-size: 0.95rem;
}

.card ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.card li {
  position: relative;
  padding-left: 1.5rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 0.35rem;
}

.card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient-primary);
}

.scenario-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-lg);
}

.scenario {
  padding: var(--space-lg);
  background: var(--color-surface-glass);
  backdrop-filter: blur(14px) saturate(150%);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 6px 24px var(--color-shadow);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.scenario:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 40px var(--color-shadow-strong);
}

.scenario h3 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.15rem;
}

.scenario h3::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: var(--gradient-primary);
  flex-shrink: 0;
  transform: rotate(45deg);
}

.scenario p {
  margin: 0;
  color: var(--color-text-soft);
  font-size: 0.94rem;
}

.solution-list {
  display: grid;
  gap: var(--space-md);
  max-width: 960px;
  margin: 0 auto;
}

.solution-list article {
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 5px solid var(--color-primary);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 16px var(--color-shadow);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.solution-list article:hover {
  transform: translateX(6px);
  box-shadow: 0 12px 30px var(--color-shadow-strong);
}

.solution-list h3 {
  font-size: 1.1rem;
  color: var(--color-primary);
}

.solution-list p {
  margin: 0;
  color: var(--color-text-soft);
  font-size: 0.94rem;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.case {
  display: flex;
  flex-direction: column;
  padding: var(--space-lg);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: 0 6px 22px var(--color-shadow);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.case:hover {
  transform: translateY(-8px) scale(1.01);
  box-shadow: 0 22px 48px var(--color-shadow-strong);
}

.case h3 {
  font-size: 1.15rem;
}

.case p {
  color: var(--color-text-soft);
  font-size: 0.94rem;
}

.case blockquote {
  margin: auto 0 0;
  font-size: 0.9rem;
}

.howto {
  max-width: 900px;
  margin: 0 auto;
  color: var(--color-text-soft);
}

.howto h3 {
  margin-top: var(--space-xl);
  padding: 0.6rem 1rem;
  background: var(--gradient-soft);
  border-radius: var(--radius-sm);
  color: var(--color-heading);
}

.howto h4 {
  margin-top: var(--space-lg);
  color: var(--color-primary);
  padding-bottom: 0.3rem;
  border-bottom: 1px dashed var(--color-border);
}

.howto ul {
  padding-left: 1.2rem;
}

.howto li {
  margin-bottom: 0.5rem;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.article-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 18px var(--color-shadow);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 40px var(--color-shadow-strong);
  border-color: rgba(233, 69, 96, 0.3);
}

.article-card h3 {
  font-size: 1.08rem;
  line-height: 1.5;
}

.article-card h3 a {
  color: var(--color-heading);
  background-image: linear-gradient(var(--color-primary), var(--color-primary));
  background-size: 0 2px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: background-size var(--transition-base), color var(--transition-fast);
}

.article-card h3 a:hover {
  color: var(--color-primary);
  background-size: 100% 2px;
}

.article-card .meta {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.article-card p:last-child {
  margin-bottom: 0;
  color: var(--color-text-soft);
  font-size: 0.92rem;
}

.faq-list {
  max-width: 880px;
  margin: 0 auto;
  display: grid;
  gap: var(--space-sm);
}

.faq-list details {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 3px 14px var(--color-shadow);
  overflow: hidden;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.faq-list details[open] {
  border-color: rgba(233, 69, 96, 0.35);
  box-shadow: 0 10px 28px var(--color-shadow-strong);
}

.faq-list summary {
  position: relative;
  padding: 1.1rem 3rem 1.1rem 1.4rem;
  font-weight: 600;
  color: var(--color-heading);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition-fast), background var(--transition-fast);
}

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

.faq-list summary::after {
  content: "";
  position: absolute;
  right: 1.4rem;
  top: 50%;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
  transform: translateY(-70%) rotate(45deg);
  transition: transform var(--transition-base);
}

.faq-list details[open] summary::after {
  transform: translateY(-30%) rotate(-135deg);
}

.faq-list summary:hover {
  color: var(--color-primary);
  background: var(--gradient-soft);
}

.faq-list details p {
  margin: 0;
  padding: 0 1.4rem 1.3rem;
  color: var(--color-text-soft);
  font-size: 0.94rem;
  animation: fadeIn 0.35s ease;
}

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

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.about-grid article {
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 18px var(--color-shadow);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.about-grid article:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 36px var(--color-shadow-strong);
}

.about-grid h3 {
  color: var(--color-primary);
  font-size: 1.1rem;
}

.about-grid p {
  margin: 0;
  color: var(--color-text-soft);
  font-size: 0.94rem;
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.2rem;
  border-left: 2px solid var(--color-border);
}

.timeline li {
  position: relative;
  padding-left: 0.6rem;
  margin-bottom: 0.7rem;
  font-size: 0.92rem;
  color: var(--color-text-soft);
}

.timeline li::before {
  content: "";
  position: absolute;
  left: -1.55rem;
  top: 0.55em;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gradient-primary);
  box-shadow: 0 0 0 3px var(--color-bg);
}

.timeline strong {
  color: var(--color-primary);
}

.news-list {
  list-style: none;
  max-width: 900px;
  margin: 0 auto;
  padding: 0;
}

.news-list li {
  padding: 0.9rem 1.2rem;
  margin-bottom: 0.6rem;
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-primary);
  font-size: 0.94rem;
  color: var(--color-text-soft);
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.news-list li:hover {
  transform: translateX(6px);
  background: var(--gradient-soft);
}

.news-list time {
  display: inline-block;
  margin-right: 0.6rem;
  font-weight: 600;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  max-width: 1000px;
  margin: 0 auto;
}

.contact-info,
.contact-form-wrap {
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 6px 24px var(--color-shadow);
}

.contact-info h3,
.contact-form-wrap h3 {
  color: var(--color-primary);
}

.contact-info address p {
  margin-bottom: 0.6rem;
  font-size: 0.92rem;
  color: var(--color-text-soft);
}

.contact-info strong {
  color: var(--color-heading);
}

.contact-form-wrap form {
  display: grid;
  gap: 0.4rem;
}

.contact-form-wrap label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-soft);
  margin-top: 0.5rem;
}

.contact-form-wrap input,
.contact-form-wrap textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.contact-form-wrap textarea {
  resize: vertical;
  min-height: 110px;
}

.contact-form-wrap input:focus,
.contact-form-wrap textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.15);
}

.contact-form-wrap .btn {
  margin-top: var(--space-md);
  justify-self: start;
}

.sitemap-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  margin: 0;
  padding: 0;
}

.sitemap-list a {
  display: inline-block;
  padding: 0.45rem 1.1rem;
  border-radius: 999px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  font-size: 0.88rem;
  color: var(--color-text-soft);
  transition: all var(--transition-fast);
}

.sitemap-list a:hover {
  background: var(--gradient-primary);
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px);
}

.friends-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
  margin: 0;
  padding: 0;
}

.friends-list a {
  display: inline-block;
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-sm);
  background: var(--color-surface-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--color-border);
  font-size: 0.88rem;
  color: var(--color-text-soft);
  transition: all var(--transition-fast);
}

.friends-list a:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.author-box {
  max-width: 820px;
  margin: 0 auto;
  padding: var(--space-lg);
  background: var(--color-surface-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 28px var(--color-shadow);
}

.author-box p {
  margin-bottom: 0.6rem;
  font-size: 0.92rem;
  color: var(--color-text-soft);
}

.author-box strong {
  color: var(--color-heading);
}

.site-footer {
  background: linear-gradient(160deg, #1a1a2e 0%, #12122a 100%);
  color: rgba(238, 241, 248, 0.75);
  margin-top: var(--space-xl);
  padding: var(--space-xl) 0 var(--space-lg);
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: grid;
  grid-template-columns: 1.2fr 1fr 1.3fr;
  gap: var(--space-lg);
  align-items: start;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.footer-brand svg {
  border-radius: 10px;
}

.footer-brand p {
  margin: 0;
  font-size: 0.9rem;
  color: rgba(238, 241, 248, 0.7);
}

.footer-inner nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.2rem;
  margin: 0;
  padding: 0;
}

.footer-inner nav a {
  color: rgba(238, 241, 248, 0.7);
  font-size: 0.9rem;
  position: relative;
}

.footer-inner nav a:hover {
  color: #ff7a59;
}

.footer-contact p {
  margin: 0 0 0.4rem;
  font-size: 0.85rem;
  color: rgba(238, 241, 248, 0.6);
}

.copyright {
  grid-column: 1 / -1;
  margin: var(--space-lg) 0 0;
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: 0.8rem;
  color: rgba(238, 241, 248, 0.5);
}

.back-to-top {
  position: fixed;
  right: 1.4rem;
  bottom: 1.4rem;
  z-index: 900;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 8px 24px rgba(233, 69, 96, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-4px) scale(1.06);
  box-shadow: 0 14px 32px rgba(233, 69, 96, 0.5);
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 {
  transition-delay: 0.08s;
}

.reveal-delay-2 {
  transition-delay: 0.16s;
}

.reveal-delay-3 {
  transition-delay: 0.24s;
}

@media (max-width: 1080px) {
  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .site-search input {
    width: 120px;
  }

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

  .hero-visual {
    max-width: 520px;
    margin: 0 auto;
    animation: none;
  }
}

@media (max-width: 860px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }

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

@media (max-width: 720px) {
  :root {
    --header-height: 64px;
    --space-2xl: 3rem;
    --space-xl: 2.25rem;
  }

  body {
    font-size: 15px;
  }

  .header-inner {
    gap: var(--space-sm);
  }

  .brand-text small {
    display: none;
  }

  .site-search {
    display: none;
  }

  .hero {
    margin: var(--space-sm) var(--space-sm) 0;
    border-radius: var(--radius-lg);
  }

  .hero-stats {
    gap: 1.2rem;
  }

  .hero-stats li {
    min-width: 40%;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
  }

  .card-grid,
  .scenario-list,
  .case-grid,
  .article-grid,
  .about-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .back-to-top {
    right: 1rem;
    bottom: 1rem;
    width: 44px;
    height: 44px;
  }

  .section-head {
    margin-bottom: var(--space-lg);
  }
}

@media (max-width: 420px) {
  .hero-stats li {
    min-width: 100%;
  }

  .btn {
    padding: 0.7rem 1.4rem;
    font-size: 0.9rem;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media print {
  .site-header,
  .back-to-top,
  .hero-visual,
  .mobile-menu {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .section {
    padding: 1rem 0;
  }
}