/* 认知矩阵 · Cognitive Matrix — Design Tokens */
:root {
  --color-primary: #0d7377;
  --color-primary-deep: #095456;
  --color-secondary: #14919b;
  --color-cta: #c45c26;
  --color-cta-hover: #a34a1c;
  --color-bg: #f4f7f8;
  --color-bg-elevated: #ffffff;
  --color-surface: #e8eef0;
  --color-text: #0f1c1e;
  --color-text-muted: #4a5c60;
  --color-border: #c5d2d6;
  --color-matrix: rgba(13, 115, 119, 0.08);
  --color-paywall: rgba(244, 247, 248, 0.92);

  --font-display: "Sora", "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", "Sora", sans-serif;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  --radius-sm: 4px;
  --radius-md: 8px;
  --shadow-sm: 0 1px 2px rgba(15, 28, 30, 0.06);
  --shadow-md: 0 4px 12px rgba(15, 28, 30, 0.08);
  --transition: 200ms ease;
  --max-w: 1120px;
  --header-h: 72px;
}

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

html {
  scroll-behavior: smooth;
}

@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;
  }
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    linear-gradient(165deg, #eef5f6 0%, var(--color-bg) 42%, #e6f0f1 100%),
    linear-gradient(var(--color-matrix) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-matrix) 1px, transparent 1px);
  background-size: auto, 48px 48px, 48px 48px;
  background-attachment: fixed;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

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

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

button,
.btn {
  font-family: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

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

/* ——— Layout ——— */
.container {
  width: min(100% - 2rem, var(--max-w));
  margin-inline: auto;
}

@media (min-width: 768px) {
  .container {
    width: min(100% - 3rem, var(--max-w));
  }
}

/* ——— Header ——— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(244, 247, 248, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text);
  flex-shrink: 0;
}

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

.brand-mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

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

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.brand-sub {
  font-size: 0.68rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

.nav-desktop {
  display: none;
  align-items: center;
  gap: 1.75rem;
}

.nav-desktop a {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  font-weight: 500;
}

.nav-desktop a:hover,
.nav-desktop a.active {
  color: var(--color-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.user-chip {
  display: none;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  padding: 0.35rem 0.75rem;
  background: var(--color-surface);
  border-radius: var(--radius-sm);
}

.user-chip.is-visible {
  display: flex;
}

.user-chip .balance {
  color: var(--color-cta);
  font-weight: 600;
  font-family: var(--font-display);
}

.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  border-radius: var(--radius-sm);
  color: var(--color-text);
}

@media (min-width: 900px) {
  .nav-desktop {
    display: flex;
  }
  .menu-toggle {
    display: none;
  }
}

.nav-mobile {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  padding: var(--space-md) 0 var(--space-lg);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.nav-mobile.is-open {
  display: flex;
}

.nav-mobile a {
  padding: 0.75rem 0;
  color: var(--color-text);
  font-weight: 500;
  border-bottom: 1px solid var(--color-surface);
}

/* ——— Buttons ——— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 1.15rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition), opacity var(--transition);
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-deep);
  color: #fff;
}

.btn-cta {
  background: var(--color-cta);
  color: #fff;
}

.btn-cta:hover {
  background: var(--color-cta-hover);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-lg {
  padding: 0.8rem 1.6rem;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

/* ——— Hero ——— */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #fff;
}

.hero-visual {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(9, 84, 86, 0.94) 0%, rgba(13, 115, 119, 0.78) 48%, rgba(20, 60, 72, 0.88) 100%),
    url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.06'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E"),
    linear-gradient(180deg, #0a4a4c 0%, #1a3a42 100%);
  background-size: auto, 60px 60px, auto;
}

.hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 70% 20%, rgba(20, 145, 155, 0.35), transparent),
    radial-gradient(ellipse 60% 40% at 10% 80%, rgba(196, 92, 38, 0.2), transparent);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(100% - 2rem, var(--max-w));
  margin: 0 auto;
  padding: var(--space-3xl) 0 calc(var(--space-3xl) + 1rem);
}

.hero-split {
  display: grid;
  gap: var(--space-2xl);
  align-items: center;
}

@media (min-width: 960px) {
  .hero-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 3rem;
  }
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 7vw, 4.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--space-md);
  opacity: 0;
  animation: rise-in 0.7s ease-out 0.1s forwards;
}

.hero-headline {
  font-size: clamp(1.15rem, 2.5vw, 1.45rem);
  font-weight: 500;
  max-width: 28ch;
  line-height: 1.45;
  margin-bottom: var(--space-md);
  opacity: 0;
  animation: rise-in 0.7s ease-out 0.25s forwards;
}

.hero-desc {
  font-size: 1rem;
  max-width: 40ch;
  margin-bottom: var(--space-xl);
  color: rgba(255, 255, 255, 0.85);
  opacity: 0;
  animation: rise-in 0.7s ease-out 0.4s forwards;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  opacity: 0;
  animation: rise-in 0.7s ease-out 0.55s forwards;
}

.hero-cta .btn-ghost {
  border-color: rgba(255, 255, 255, 0.45);
  color: #fff;
}

.hero-cta .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  color: #fff;
}

.hero-aside {
  opacity: 0;
  animation: rise-in 0.75s ease-out 0.35s forwards;
}

.hero-feature {
  display: block;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: #fff;
  min-height: 280px;
}

.hero-feature:hover {
  color: #fff;
}

.hero-feature img {
  width: 100%;
  height: 100%;
  min-height: 280px;
  object-fit: cover;
  position: absolute;
  inset: 0;
  transition: transform 0.45s ease-out;
}

.hero-feature:hover img {
  transform: scale(1.04);
}

.hero-feature-body {
  position: relative;
  z-index: 1;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.35rem 1.4rem;
  background: linear-gradient(180deg, transparent 15%, rgba(8, 32, 34, 0.88) 100%);
}

.hero-feature-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 0.5rem;
}

.hero-feature h2 {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.2vw, 1.4rem);
  line-height: 1.35;
  margin-bottom: 0.45rem;
}

.hero-feature p {
  font-size: 0.88rem;
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.78);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.hero-rail {
  list-style: none;
  margin-top: 0.85rem;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.hero-rail li + li {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.hero-rail a {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
  padding: 0.85rem 0;
  color: rgba(255, 255, 255, 0.9);
  transition: color var(--transition);
}

.hero-rail a:hover {
  color: #fff;
}

.hero-rail-index {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.45);
  line-height: 1.4;
}

.hero-rail-text {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
}

.hero-rail-text strong {
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.4;
}

.hero-rail-text em {
  font-style: normal;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.55);
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Home feed + sidebar */
.home-feed-layout {
  display: grid;
  gap: var(--space-xl);
}

@media (min-width: 1024px) {
  .home-feed-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: var(--space-2xl);
    align-items: start;
  }
}

.home-feed-main .article-grid {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .home-feed-main .article-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.home-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.home-side-block h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  margin-bottom: 0.85rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--color-border);
}

.rank-list {
  list-style: none;
  counter-reset: none;
}

.rank-list li + li {
  margin-top: 0.65rem;
}

.rank-list a {
  display: flex;
  gap: 0.7rem;
  align-items: flex-start;
  color: var(--color-text);
}

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

.rank-num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-cta);
  min-width: 1.1rem;
  line-height: 1.4;
}

.rank-list li:nth-child(n + 4) .rank-num {
  color: var(--color-text-muted);
}

.rank-title {
  font-size: 0.9rem;
  font-weight: 500;
  line-height: 1.45;
}

.side-cat-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.side-cat-link {
  width: 100%;
  text-align: left;
  padding: 0.55rem 0;
  border: none;
  border-bottom: 1px solid var(--color-surface);
  background: transparent;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: color var(--transition);
}

.side-cat-link:hover {
  color: var(--color-primary);
}

.home-side-member p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  margin-bottom: 0.85rem;
}

/* ——— Sections ——— */
.section {
  padding: var(--space-3xl) 0;
}

.section-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-sub {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-top: 0.35rem;
}

.section-link {
  font-weight: 600;
  font-size: 0.9rem;
}

/* ——— Article Grid ——— */
.article-grid {
  display: grid;
  gap: var(--space-lg);
}

@media (min-width: 640px) {
  .article-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .article-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.article-card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
  color: inherit;
  height: 100%;
}

.article-card:hover {
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-md);
  color: inherit;
}

.article-card-cover {
  aspect-ratio: 16 / 10;
  background: var(--color-surface);
  position: relative;
  overflow: hidden;
}

.article-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease-out;
}

.article-card:hover .article-card-cover img {
  transform: scale(1.04);
}

.article-card-body {
  padding: 1.15rem 1.25rem 1.35rem;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 0.5rem;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.tag {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  background: rgba(13, 115, 119, 0.1);
  color: var(--color-primary);
  font-size: 0.72rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  letter-spacing: 0.02em;
}

.tag-premium {
  background: rgba(196, 92, 38, 0.12);
  color: var(--color-cta);
}

.article-card-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.article-card-excerpt {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-footer {
  margin-top: 0.75rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-primary);
}

/* Featured row */
.featured-layout {
  display: grid;
  gap: var(--space-lg);
}

@media (min-width: 900px) {
  .featured-layout {
    grid-template-columns: 1.4fr 1fr;
    gap: var(--space-xl);
  }
}

.featured-main {
  display: block;
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  min-height: 320px;
  color: #fff;
  border: 1px solid var(--color-border);
}

.featured-main:hover {
  color: #fff;
}

.featured-main img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.featured-main-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 20%, rgba(15, 28, 30, 0.88) 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.75rem;
  transition: background var(--transition);
}

.featured-main:hover .featured-main-overlay {
  background: linear-gradient(180deg, transparent 10%, rgba(9, 84, 86, 0.92) 100%);
}

.featured-main h2 {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  line-height: 1.3;
  margin: 0.5rem 0;
}

.featured-side {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.featured-side-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 1rem;
  padding: 0.85rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: inherit;
  transition: border-color var(--transition);
}

.featured-side-item:hover {
  border-color: var(--color-secondary);
  color: inherit;
}

.featured-side-item img {
  width: 100px;
  height: 72px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.featured-side-item h3 {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
  font-family: var(--font-display);
}

.featured-side-item p {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

/* ——— Categories strip ——— */
.cat-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--space-xl);
}

.cat-chip {
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: all var(--transition);
  cursor: pointer;
}

.cat-chip:hover,
.cat-chip.active {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(13, 115, 119, 0.08);
}

/* ——— Article Detail ——— */
.article-page {
  padding: var(--space-2xl) 0 var(--space-3xl);
}

.article-layout {
  display: grid;
  gap: var(--space-2xl);
}

@media (min-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr 280px;
  }
}

.article-header {
  margin-bottom: var(--space-xl);
}

.article-header .article-meta {
  margin-bottom: var(--space-md);
}

.article-header h1 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.4rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

.article-lead {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

.article-cover {
  aspect-ratio: 21 / 9;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--space-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

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

.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  max-width: 68ch;
}

.article-body p {
  margin-bottom: 1.25rem;
}

.article-body h2 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin: 2rem 0 0.85rem;
  letter-spacing: -0.01em;
}

.article-body ul {
  margin: 0 0 1.25rem 1.25rem;
}

.article-body li {
  margin-bottom: 0.4rem;
}

/* Paywall */
.paywall-wrap {
  position: relative;
}

.paywall-fade {
  position: relative;
  max-height: 280px;
  overflow: hidden;
  mask-image: linear-gradient(180deg, #000 40%, transparent 100%);
  -webkit-mask-image: linear-gradient(180deg, #000 40%, transparent 100%);
}

.paywall-gate {
  margin-top: -2rem;
  position: relative;
  z-index: 2;
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  background: linear-gradient(180deg, transparent 0%, var(--color-bg) 18%);
}

.paywall-box {
  max-width: 420px;
  margin: 0 auto;
  padding: var(--space-xl);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.paywall-box h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.paywall-box p {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  margin-bottom: var(--space-lg);
}

.paywall-actions {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

@media (min-width: 480px) {
  .paywall-actions {
    flex-direction: row;
    justify-content: center;
  }
}

.sidebar-widget {
  padding: 1.25rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
}

.sidebar-widget h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  margin-bottom: 0.85rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--color-surface);
}

.sidebar-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.sidebar-list a {
  color: var(--color-text);
  font-size: 0.88rem;
  font-weight: 500;
  line-height: 1.4;
  display: block;
}

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

.sidebar-list span {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-weight: 400;
  margin-top: 0.2rem;
}

/* ——— Auth & Forms ——— */
.auth-page {
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  padding: var(--space-2xl) 0;
}

.auth-card {
  width: min(100%, 420px);
  margin: 0 auto;
  padding: var(--space-2xl);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  opacity: 0;
  animation: rise-in 0.5s ease-out forwards;
}

.auth-card h1 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  margin-bottom: 0.35rem;
  letter-spacing: -0.02em;
}

.auth-card .auth-sub {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  margin-bottom: var(--space-xl);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(13, 115, 119, 0.15);
}

.form-error {
  color: #b91c1c;
  font-size: 0.85rem;
  margin-bottom: var(--space-md);
  display: none;
}

.form-error.is-visible {
  display: block;
}

.form-success {
  color: var(--color-primary);
  font-size: 0.85rem;
  margin-bottom: var(--space-md);
  display: none;
}

.form-success.is-visible {
  display: block;
}

.auth-footer {
  margin-top: var(--space-lg);
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* ——— Recharge ——— */
.recharge-page {
  padding: var(--space-2xl) 0 var(--space-3xl);
}

.recharge-hero {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.recharge-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.2rem);
  margin-bottom: 0.5rem;
}

.recharge-hero p {
  color: var(--color-text-muted);
}

.balance-display {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-top: var(--space-lg);
  padding: 0.75rem 1.5rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.balance-display .label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.balance-display .value {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-cta);
}

.plan-grid {
  display: grid;
  gap: var(--space-md);
  max-width: 800px;
  margin: 0 auto;
}

@media (min-width: 640px) {
  .plan-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.plan-card {
  padding: var(--space-xl) var(--space-lg);
  background: var(--color-bg-elevated);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), box-shadow var(--transition);
  position: relative;
}

.plan-card:hover,
.plan-card.selected {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.plan-card.popular {
  border-color: var(--color-cta);
}

.plan-badge {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-cta);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.plan-credits {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
}

.plan-unit {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.plan-price {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.plan-desc {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.recharge-actions {
  max-width: 400px;
  margin: var(--space-2xl) auto 0;
  text-align: center;
}

.recharge-note {
  margin-top: var(--space-md);
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

/* ——— Pay checkout ——— */
.pay-page {
  padding: var(--space-2xl) 0 var(--space-3xl);
  display: flex;
  align-items: flex-start;
}

.pay-card {
  width: min(100%, 440px);
  margin: 0 auto;
  padding: var(--space-2xl);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  opacity: 0;
  animation: rise-in 0.45s ease-out forwards;
}

.pay-card h1 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.35rem;
}

.pay-sub {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  margin-bottom: var(--space-xl);
  line-height: 1.55;
}

.pay-order {
  padding: 1rem 1.15rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-xl);
}

.pay-order-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.92rem;
  padding: 0.45rem 0;
  color: var(--color-text-muted);
}

.pay-order-row strong {
  color: var(--color-text);
  font-weight: 600;
}

.pay-order-total {
  margin-top: 0.35rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-border);
}

.pay-amount {
  font-family: var(--font-display);
  font-size: 1.45rem;
  color: var(--color-cta);
}

.pay-method-label {
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.65rem;
}

.pay-methods {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-bottom: var(--space-xl);
}

.pay-method {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.85rem 1rem;
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  font-family: inherit;
  text-align: left;
}

.pay-method:hover,
.pay-method.selected {
  border-color: var(--color-primary);
  background: rgba(13, 115, 119, 0.06);
}

.pay-method-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.pay-back {
  display: block;
  text-align: center;
  margin-top: var(--space-md);
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

.pay-back:hover {
  color: var(--color-primary);
}

.pay-redirect,
.pay-success {
  text-align: center;
  padding: var(--space-md) 0;
}

.pay-spinner {
  width: 44px;
  height: 44px;
  margin: 0 auto 1.25rem;
  border: 3px solid var(--color-surface);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: pay-spin 0.8s linear infinite;
}

@keyframes pay-spin {
  to {
    transform: rotate(360deg);
  }
}

.pay-order-hint {
  margin-top: var(--space-lg);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.pay-success-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(13, 115, 119, 0.12);
  color: var(--color-primary);
}

@media (prefers-reduced-motion: reduce) {
  .pay-spinner {
    animation: none;
    border-top-color: var(--color-primary);
    opacity: 0.7;
  }
}

/* ——— About / Company ——— */
.about-strip {
  background: var(--color-bg-elevated);
  border-block: 1px solid var(--color-border);
  padding: var(--space-2xl) 0;
}

.about-grid {
  display: grid;
  gap: var(--space-xl);
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr 1.2fr;
    align-items: center;
  }
}

.about-grid h2 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 1.75rem);
  margin-bottom: var(--space-md);
}

.about-grid p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  text-align: center;
}

.about-stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-primary);
}

.about-stat span {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.contact-list {
  list-style: none;
  margin: var(--space-lg) 0;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.contact-list li {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 0.75rem;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--color-text-muted);
}

.contact-label {
  font-weight: 600;
  color: var(--color-primary);
}

/* ——— Footer ——— */
.site-footer {
  background: #0f1c1e;
  color: rgba(255, 255, 255, 0.75);
  padding: var(--space-2xl) 0 var(--space-xl);
  margin-top: auto;
}

.footer-grid {
  display: grid;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1.4fr 0.8fr 0.8fr 1.4fr;
  }
}

.footer-brand .brand-name {
  color: #fff;
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.6;
  max-width: 32ch;
}

.footer-col h4 {
  color: #fff;
  font-size: 0.9rem;
  margin-bottom: 0.85rem;
  font-family: var(--font-display);
}

.footer-col a {
  display: block;
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.88rem;
  margin-bottom: 0.5rem;
}

.footer-col a:hover {
  color: #fff;
}

.footer-contact p {
  font-size: 0.88rem;
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 0.55rem;
}

.footer-contact a {
  display: inline;
  margin-bottom: 0;
}

.footer-bottom {
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.45);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: space-between;
}

/* ——— Page utils ——— */
.page-main {
  min-height: calc(100vh - var(--header-h) - 200px);
}

.empty-state {
  text-align: center;
  padding: var(--space-3xl);
  color: var(--color-text-muted);
}

.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--color-text);
  color: #fff;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  z-index: 200;
  opacity: 0;
  transition: transform 0.3s ease-out, opacity 0.3s ease-out;
  pointer-events: none;
  max-width: min(90vw, 360px);
  text-align: center;
}

.toast.is-visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}