/* ENERGETIC & DYNAMIC - 动感活力设计 */

:root {
  --font-display: "Arial Rounded MT Bold", "Trebuchet MS", Impact, sans-serif;
  --font-body: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  
  --pink: #FF3B7A;
  --yellow: #FFD23F;
  --blue: #3DC2FF;
  --green: #2EE59D;
  --orange: #FF8C42;
  --purple: #B24BF3;
  
  --bg: #FAFAFA;
  --text: #1a1a1a;
  --text-light: #666;
}

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

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  overflow-x: hidden;
}

/* 动态背景装饰 */
body::before {
  content: '';
  position: fixed;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--yellow) 0%, transparent 70%);
  opacity: 0.15;
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--blue) 0%, transparent 70%);
  opacity: 0.15;
  pointer-events: none;
  z-index: 0;
}

@keyframes float1 {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50% { transform: translate(-100px, 100px) rotate(180deg); }
}

@keyframes float2 {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50% { transform: translate(100px, -100px) rotate(-180deg); }
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
img { max-width: 100%; height: auto; display: block; }

.decorative-corners { display: none; }

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.section {
  margin-bottom: 60px;
}

.jump-target { scroll-margin-top: 100px; }

/* HERO - 动感但不倾斜 */
.hero {
  position: relative;
  padding: 80px 24px 90px;
  margin-bottom: 0;
  background: linear-gradient(135deg, var(--pink) 0%, var(--orange) 100%);
  overflow: hidden;
}

/* 底部波浪裁切 */
.hero::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 40px;
  background: var(--bg);
  clip-path: ellipse(55% 100% at 50% 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: -50%;
  width: 200%;
  height: 100%;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 20px,
    rgba(255,255,255,0.05) 20px,
    rgba(255,255,255,0.05) 40px
  );
  animation: slideStripes 28s linear infinite;
  will-change: transform;
}

@keyframes slideStripes {
  0% { transform: translate3d(0, 0, 0); }
  100% { transform: translate3d(56px, 0, 0); }
}

.hero header {
  text-align: center;
  position: relative;
  z-index: 1;
}

.logo h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 10vw, 6rem);
  color: #fff;
  line-height: 0.9;
  letter-spacing: 0;
  text-shadow: 
    4px 4px 0 rgba(0,0,0,0.2),
    8px 8px 0 rgba(0,0,0,0.1);
  margin-bottom: 20px;
  transform-origin: center bottom;
  animation: heroTitleIn 620ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.logo .on-beat {
  --beat-rotation: -5deg;
  display: inline-block;
  background: rgba(0,0,0,0.2);
  color: #fff;
  font-size: 0.3em;
  padding: 10px 20px;
  border-radius: 100px;
  margin-left: 16px;
  vertical-align: middle;
  transform: rotate(var(--beat-rotation));
  transform-origin: center;
  animation: heroBadgeIn 500ms cubic-bezier(0.22, 1, 0.36, 1) 160ms both;
}

@keyframes heroTitleIn {
  0% { opacity: 0; transform: translateY(22px) scale(0.95) rotate(-1.4deg); }
  100% { opacity: 1; transform: translateY(0) scale(1) rotate(0); }
}

@keyframes heroBadgeIn {
  0% { opacity: 0; transform: translateY(10px) rotate(calc(var(--beat-rotation) - 6deg)) scale(0.9); }
  100% { opacity: 1; transform: translateY(0) rotate(var(--beat-rotation)) scale(1); }
}

.tagline {
  font-size: 1.3rem;
  font-weight: 700;
  color: rgba(255,255,255,0.95);
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 18px 48px;
  background: #fff;
  color: var(--pink);
  font-family: var(--font-display);
  font-size: 1.3rem;
  border-radius: 100px;
  box-shadow: 0 8px 0 rgba(0,0,0,0.15);
  transition: all 0.15s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  animation: fadeInUp 0.8s ease-out 0.4s backwards;
  position: relative;
}

.hero-cta:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 12px 0 rgba(0,0,0,0.15);
}

.hero-cta:active {
  transform: translateY(2px) scale(0.98);
  box-shadow: 0 4px 0 rgba(0,0,0,0.15);
}

/* QUICK NAV - 倾斜标签 */
.quick-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 24px;
  background: #fff;
  border-bottom: 2px solid #eee;
  margin: 0 0 40px;
  container-type: inline-size;
}

.quick-nav a {
  padding: 10px 20px;
  font-size: 0.9rem;
  font-weight: 800;
  color: #666;
  background: transparent;
  border-radius: 100px;
  white-space: nowrap;
  position: relative;
}

@container (min-width: 800px) {
  .quick-nav a {
    padding: 12px 32px;
    font-size: 1.1rem;
  }
}

@container (min-width: 1100px) {
  .quick-nav a {
    padding: 14px 40px;
    font-size: 1.25rem;
  }
}

@container (max-width: 600px) {
  .quick-nav a {
    padding: 8px 12px;
    font-size: 0.78rem;
  }
}

@container (max-width: 480px) {
  .quick-nav a {
    padding: 8px 8px;
    font-size: 0.7rem;
  }
}

@container (max-width: 380px) {
  .quick-nav a {
    padding: 6px 6px;
    font-size: 0.62rem;
  }
}

.quick-nav a::after {
  content: '';
  position: absolute;
  bottom: -14px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 3px;
  background: var(--pink);
  border-radius: 100px;
}

.quick-nav a:hover {
  color: var(--text);
  background: #f5f5f5;
}

.quick-nav a:hover::after {
  transform: translateX(-50%) scaleX(1);
}

.quick-nav a.is-active {
  color: var(--pink);
  background: rgba(255, 59, 122, 0.08);
  font-weight: 900;
}

.quick-nav a.is-active::after {
  transform: translateX(-50%) scaleX(1);
  background: var(--pink);
}

/* SECTION HEADERS - 倾斜色块 */
.section-header {
  margin-bottom: 40px;
  position: relative;
}

.section-eyebrow {
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: #fff;
  display: inline-block;
  padding: 12px 32px;
  background: var(--pink);
  transform: rotate(-2deg);
  box-shadow: 6px 6px 0 rgba(0,0,0,0.1);
  position: relative;
}

.section-eyebrow::after {
  content: '';
  position: absolute;
  bottom: -8px;
  right: -8px;
  width: 100%;
  height: 100%;
  background: var(--yellow);
  z-index: -1;
  transform: rotate(4deg);
}

/* FEATURED SECTION */
.ios-featured {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 768px) {
  .ios-featured {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
}

@media (min-width: 1024px) {
  .ios-featured {
    grid-template-columns: 2fr 1fr;
    gap: 20px;
  }
}

/* Random Challenge - 超动感卡片 */
.ios-random-card {
  width: 100%;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 24px;
  background: var(--pink);
  padding: 40px;
  border-radius: 24px;
  box-shadow: 8px 8px 0 rgba(0,0,0,0.1);
  transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  position: relative;
  overflow: hidden;
  transform: rotate(-1deg);
}

.ios-random-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 30px,
    rgba(255,255,255,0.05) 30px,
    rgba(255,255,255,0.05) 60px
  );
  animation: slidePattern 15s linear infinite;
}

@keyframes slidePattern {
  0% { transform: translate(0, 0); }
  100% { transform: translate(84px, 84px); }
}

.ios-random-card:hover {
  transform: rotate(0deg) translateY(-8px) scale(1.02);
  box-shadow: 12px 12px 0 rgba(0,0,0,0.15);
}

.ios-random-icon {
  width: 80px;
  height: 80px;
  border-radius: 20px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.25);
  font-size: 40px;
  position: relative;
  z-index: 1;
  transform: rotate(5deg);
  transition: transform 0.3s;
}

.ios-random-card:hover .ios-random-icon {
  transform: rotate(-5deg) scale(1.1);
}

.ios-random-content {
  flex: 1;
  position: relative;
  z-index: 1;
}

.ios-random-title {
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 6px;
  text-shadow: 2px 2px 0 rgba(0,0,0,0.1);
}

.ios-random-sub {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.9);
  font-weight: 700;
}

.ios-random-arrow {
  margin-left: auto;
  font-size: 3rem;
  color: rgba(255,255,255,0.6);
  position: relative;
  z-index: 1;
  transition: transform 0.3s;
}

.ios-random-card:hover .ios-random-arrow {
  transform: translateX(10px) scale(1.2);
}

/* Daily Challenge */
.ios-daily-bar {
  display: none;
}

@media (min-width: 600px) {
  .ios-daily-bar {
    display: flex;
    align-items: center;
    gap: 24px;
    background: var(--blue);
    padding: 40px;
    border-radius: 24px;
    box-shadow: 8px 8px 0 rgba(0,0,0,0.1);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    position: relative;
    overflow: hidden;
    transform: rotate(1deg);
  }

  .ios-daily-bar::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: repeating-linear-gradient(
      45deg,
      transparent,
      transparent 30px,
      rgba(255,255,255,0.05) 30px,
      rgba(255,255,255,0.05) 60px
    );
    animation: slidePattern 15s linear infinite reverse;
  }

  .ios-daily-bar:hover {
    transform: rotate(0deg) translateY(-8px) scale(1.02);
    box-shadow: 12px 12px 0 rgba(0,0,0,0.15);
  }
}

.ios-daily-bar-icon {
  width: 80px;
  height: 80px;
  border-radius: 20px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.25);
  font-size: 36px;
  position: relative;
  z-index: 1;
  transform: rotate(-5deg);
  transition: transform 0.3s;
}

.ios-daily-bar:hover .ios-daily-bar-icon {
  transform: rotate(5deg) scale(1.1);
}

.ios-daily-bar-content {
  flex: 1;
  position: relative;
  z-index: 1;
}

.ios-daily-bar-title {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: #fff;
  margin-bottom: 4px;
  text-shadow: 2px 2px 0 rgba(0,0,0,0.1);
}

.ios-daily-bar-sub {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.9);
  font-weight: 700;
}

.ios-daily-bar-arrow {
  margin-left: auto;
  font-size: 3rem;
  color: rgba(255,255,255,0.6);
  position: relative;
  z-index: 1;
  transition: transform 0.3s;
}

.ios-daily-bar:hover .ios-daily-bar-arrow {
  transform: translateX(10px) scale(1.2);
}

/* Daily Card (mobile) */
.ios-daily-card {
  perspective: 1000px;
  background: transparent;
}

.ios-daily-flip {
  display: grid;
  transform-style: preserve-3d;
}

.ios-daily-face {
  grid-area: 1 / 1;
  background: var(--blue);
  border-radius: 24px;
  box-shadow: 6px 6px 0 rgba(0,0,0,0.1);
  padding: 28px;
  backface-visibility: hidden;
  transition: transform 0.6s;
  position: relative;
  overflow: hidden;
}

.ios-daily-face::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 30px,
    rgba(255,255,255,0.05) 30px,
    rgba(255,255,255,0.05) 60px
  );
}

.ios-daily-front { transform: rotateY(0deg); pointer-events: auto; }
.ios-daily-back {
  transform: rotateY(-180deg);
  pointer-events: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.ios-daily-card.is-flipped .ios-daily-front { transform: rotateY(180deg); pointer-events: none; }
.ios-daily-card.is-flipped .ios-daily-back { transform: rotateY(0deg); pointer-events: auto; }

.ios-daily-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.ios-daily-label {
  font-size: 0.75rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  background: rgba(255,255,255,0.3);
  color: #fff;
  padding: 8px 16px;
  border-radius: 100px;
  transform: rotate(-2deg);
}

.ios-streak-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 800;
  color: #fff;
  background: rgba(255,255,255,0.25);
  padding: 8px 16px;
  border-radius: 100px;
  transform: rotate(2deg);
}

.ios-daily-preview {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  padding: 16px;
  background: rgba(255,255,255,0.2);
  border-radius: 16px;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.ios-daily-cell {
  aspect-ratio: 1;
  border-radius: 12px;
  background: rgba(255,255,255,0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  transition: transform 0.2s;
}

.ios-daily-cell:hover {
  transform: scale(1.1) rotate(5deg);
}

.ios-daily-cell.is-emoji { font-size: 2.8rem; }
.ios-daily-cell img { 
  width: 100%; 
  height: 100%; 
  object-fit: cover; 
  border-radius: 12px; 
}

.ios-daily-preview.is-loading {
  position: relative;
  overflow: hidden;
}

.ios-daily-preview.is-loading::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: shimmer 1.5s infinite;
}

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

.ios-daily-loading {
  position: absolute;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  font-size: 0.8rem;
  font-weight: 800;
  color: #fff;
  background: rgba(0,0,0,0.3);
  padding: 8px 16px;
  border-radius: 100px;
}

.ios-daily-flip-hint {
  width: 100%;
  padding: 14px;
  background: rgba(255,255,255,0.2);
  color: #fff;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
}

.ios-daily-flip-hint:hover {
  background: rgba(255,255,255,0.3);
  transform: scale(1.02);
}

.ios-daily-start {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 18px;
  background: #fff;
  color: var(--blue);
  font-family: var(--font-display);
  font-size: 1.2rem;
  border-radius: 100px;
  box-shadow: 0 6px 0 rgba(0,0,0,0.15);
  transition: all 0.2s;
  position: relative;
  z-index: 1;
}

.ios-daily-start:hover {
  transform: translateY(-3px);
  box-shadow: 0 9px 0 rgba(0,0,0,0.15);
}

.ios-daily-start:active {
  transform: translateY(0);
  box-shadow: 0 3px 0 rgba(0,0,0,0.15);
}

.ios-daily-start small {
  font-family: var(--font-body);
  font-size: 0.75rem;
  opacity: 0.7;
}

/* Weekline */
.ios-weekline {
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: rgba(255,255,255,0.2);
  border-radius: 16px;
  padding: 16px;
  position: relative;
  z-index: 1;
}

.ios-weekline-header {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}

.ios-weekday-head {
  text-align: center;
  font-size: 0.7rem;
  font-weight: 900;
  color: rgba(255,255,255,0.8);
  text-transform: uppercase;
}

.ios-weekline-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
}

.ios-weekday-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 10px 6px;
  border-radius: 12px;
  transition: transform 0.2s;
}

.ios-weekday-card:hover {
  transform: scale(1.1);
}

.ios-weekday-card.today {
  background: rgba(255,255,255,0.25);
}

.ios-weekday-num {
  font-size: 1rem;
  font-weight: 900;
  color: #fff;
}

.ios-weekday-num.future {
  opacity: 0.4;
}

.ios-weekday-mark {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  transition: transform 0.2s;
}

.ios-weekday-mark:hover {
  transform: rotate(360deg);
}

.ios-weekday-mark.done {
  background: var(--green);
  color: #fff;
  box-shadow: 0 3px 0 rgba(0,0,0,0.15);
}

.ios-weekday-mark.pending {
  background: rgba(255,255,255,0.2);
}

.ios-weekday-mark.future {
  background: rgba(255,255,255,0.1);
}

.ios-daily-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  position: relative;
  z-index: 1;
}

.ios-daily-stat {
  background: rgba(255,255,255,0.2);
  border-radius: 12px;
  padding: 16px;
  text-align: center;
  transition: transform 0.2s;
}

.ios-daily-stat:hover {
  transform: scale(1.05) rotate(-2deg);
}

.ios-daily-stat strong {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 1.4rem;
  color: #fff;
  margin-bottom: 6px;
  font-weight: 900;
}

.ios-daily-stat span {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.85);
  text-transform: uppercase;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.ios-daily-back-hint {
  padding: 10px;
  background: transparent;
  color: rgba(255,255,255,0.8);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
  z-index: 1;
  border-radius: 8px;
}

.ios-daily-back-hint:hover {
  color: #fff;
  background: rgba(255,255,255,0.1);
}

.ios-daily-modal { display: contents; }
.ios-daily-modal-backdrop { display: none; }

@media (min-width: 600px) {
  .ios-daily-modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1200;
    align-items: center;
    justify-content: center;
    padding: 24px;
  }

  .ios-daily-modal.is-open { display: flex; }

  .ios-daily-modal-backdrop {
    display: block;
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(10px);
  }

  .ios-daily-modal .ios-daily-card {
    position: relative;
    z-index: 1;
    width: min(94vw, 420px);
  }
}

/* LEVEL GRID - 自适应宽度，JS动态计算两行数量 */
.ios-level-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  grid-column: 1 / -1;
}

@media (min-width: 640px) {
  .ios-level-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
}

@media (min-width: 900px) {
  .ios-level-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1200px) {
  .ios-level-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.ios-level-card {
  background: #fff;
  border-radius: 20px;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.1);
  padding: 16px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  transform: rotate(-1deg);
}

.ios-level-card:nth-child(even) {
  transform: rotate(1deg);
}

.ios-level-card:hover {
  transform: rotate(0deg) translateY(-8px) scale(1.05);
  box-shadow: 8px 8px 0 rgba(0,0,0,0.15);
}

.ios-level-preview {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 8px;
  background: #f5f5f5;
  border-radius: 16px;
  padding: 10px;
  margin-bottom: 14px;
  aspect-ratio: 1;
}

.ios-level-cell {
  border-radius: 10px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  transition: transform 0.2s;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.ios-level-card:hover .ios-level-cell {
  transform: scale(1.1) rotate(5deg);
}

.ios-level-cell.is-emoji { font-size: 2.2rem; }
.ios-level-cell img { 
  width: 100%; 
  height: 100%; 
  object-fit: cover; 
  border-radius: 10px; 
}

.ios-level-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.ios-level-name {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ios-level-difficulty {
  font-size: 0.7rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 6px 12px;
  border-radius: 100px;
  flex-shrink: 0;
  transform: rotate(-3deg);
}

.ios-level-difficulty.easy {
  background: var(--green);
  color: #fff;
}

.ios-level-difficulty.medium {
  background: var(--yellow);
  color: var(--text);
}

.ios-level-difficulty.hard {
  background: var(--orange);
  color: #fff;
}

.ios-level-difficulty.expert {
  background: var(--pink);
  color: #fff;
}

/* CREATE YOUR OWN - 超级显眼！ */
.custom-challenge-section {
  margin: 0 0 40px;
}

.custom-challenge-card {
  display: flex;
  align-items: center;
  gap: 32px;
  background: linear-gradient(135deg, var(--purple) 0%, var(--pink) 100%);
  padding: 60px;
  border-radius: 32px;
  box-shadow: 12px 12px 0 rgba(0,0,0,0.15);
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  position: relative;
  overflow: hidden;
  transform: rotate(-1deg);
}

.custom-challenge-card::before {
  content: '';
  position: absolute;
  top: -100%;
  left: -100%;
  width: 300%;
  height: 300%;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 40px,
    rgba(255,255,255,0.08) 40px,
    rgba(255,255,255,0.08) 80px
  );
  animation: slidePattern 22s linear infinite;
  will-change: transform;
}

.custom-challenge-card:hover {
  transform: rotate(0deg) translateY(-12px) scale(1.03);
  box-shadow: 16px 16px 0 rgba(0,0,0,0.2);
}

.custom-challenge-icon {
  width: 100px;
  height: 100px;
  border-radius: 24px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.3);
  position: relative;
  z-index: 1;
  transform: rotate(10deg);
  transition: transform 0.4s;
  box-shadow: 6px 6px 0 rgba(0,0,0,0.1);
}

.custom-challenge-card:hover .custom-challenge-icon {
  transform: rotate(-10deg) scale(1.15);
  animation: bounce 0.6s ease-in-out;
}

@keyframes bounce {
  0%, 100% { transform: rotate(-10deg) scale(1.15); }
  50% { transform: rotate(-10deg) scale(1.25) translateY(-10px); }
}

.custom-challenge-icon svg {
  width: 50px;
  height: 50px;
  color: #fff;
  stroke-width: 3.5;
}

.custom-challenge-content {
  flex: 1;
  position: relative;
  z-index: 1;
}

.custom-challenge-content h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  color: #fff;
  line-height: 1.1;
  text-shadow: 4px 4px 0 rgba(0,0,0,0.15);
}

.custom-challenge-arrow {
  font-size: 4rem;
  color: rgba(255,255,255,0.7);
  margin-left: auto;
  position: relative;
  z-index: 1;
  transition: transform 0.4s;
}

.custom-challenge-card:hover .custom-challenge-arrow {
  transform: translateX(16px) scale(1.3);
  animation: arrowBounce 0.6s ease-in-out infinite;
}

@keyframes arrowBounce {
  0%, 100% { transform: translateX(16px) scale(1.3); }
  50% { transform: translateX(24px) scale(1.3); }
}

@media (max-width: 768px) {
  .custom-challenge-card {
    padding: 40px 28px;
    gap: 24px;
  }
  
  .custom-challenge-icon {
    width: 70px;
    height: 70px;
  }
  
  .custom-challenge-icon svg {
    width: 35px;
    height: 35px;
  }
  
  .custom-challenge-arrow {
    font-size: 2.5rem;
  }
}

/* COMMUNITY GRID - 活泼卡片 */
.community-preview-section {
  margin-bottom: 100px;
}

.community-preview-status {
  margin-bottom: 24px;
  color: var(--text-light);
  font-size: 0.95rem;
  font-weight: 600;
}

.community-preview-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}

@media (min-width: 640px) {
  .community-preview-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

@media (min-width: 900px) {
  .community-preview-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1200px) {
  .community-preview-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.card {
  background: #fff;
  border-radius: 20px;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.1);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  transform: rotate(-1deg);
}

.card:nth-child(even) {
  transform: rotate(1deg);
}

.card:hover {
  transform: rotate(0deg) translateY(-8px) scale(1.03);
  box-shadow: 8px 8px 0 rgba(0,0,0,0.15);
}

.card-preview {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 8px;
  background: #f5f5f5;
  padding: 10px;
  aspect-ratio: 1;
}

.card-cell {
  border-radius: 10px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  transition: transform 0.2s;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.card:hover .card-cell {
  transform: scale(1.1) rotate(5deg);
}

.card-cell.is-emoji { font-size: 2.2rem; }
.card-cell img { 
  width: 100%; 
  height: 100%; 
  object-fit: cover; 
  border-radius: 10px; 
}

.card-info {
  padding: 18px;
}

.card-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 10px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.85rem;
  color: var(--text-light);
  font-weight: 700;
}

.card-author {
  display: flex;
  align-items: center;
  gap: 6px;
}

.card-author::before {
  content: '👤';
  font-size: 1rem;
}

.card-plays {
  display: flex;
  align-items: center;
  gap: 6px;
}

.card-plays::before {
  content: '▶';
  font-size: 0.75rem;
}

.community-preview-actions {
  text-align: center;
}

.community-preview-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 40px;
  background: #fff;
  color: var(--text);
  font-weight: 800;
  border-radius: 100px;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.1);
  transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.community-preview-btn:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 8px 8px 0 rgba(0,0,0,0.15);
}

.community-preview-btn:active {
  transform: translateY(0) scale(0.98);
  box-shadow: 2px 2px 0 rgba(0,0,0,0.1);
}

/* VIDEO GRID */
.video-preview-section {
  margin-bottom: 100px;
}

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

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

@media (min-width: 900px) {
  .video-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1200px) {
  .video-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.video-card {
  background: #fff;
  border-radius: 20px;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.1);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  transform: rotate(-1deg);
}

.video-card:nth-child(even) {
  transform: rotate(1deg);
}

.video-card:hover {
  transform: rotate(0deg) translateY(-8px) scale(1.03);
  box-shadow: 8px 8px 0 rgba(0,0,0,0.15);
}

.video-thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #f5f5f5;
  overflow: hidden;
}

.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}

.video-card:hover .video-thumb img {
  transform: scale(1.1);
}

.video-play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.3);
  opacity: 0;
  transition: opacity 0.3s;
}

.video-card:hover .video-play-overlay {
  opacity: 1;
}

.video-play-btn {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 0 rgba(0,0,0,0.15);
  transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.video-card:hover .video-play-btn {
  transform: scale(1.2);
  box-shadow: 0 8px 0 rgba(0,0,0,0.2);
}

.video-play-btn::after {
  content: '▶';
  font-size: 1.4rem;
  color: var(--pink);
  margin-left: 4px;
}

.video-info {
  padding: 18px;
}

.video-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  line-height: 1.4;
}

/* MODAL */
#modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(10px);
}

#modal.is-open {
  display: flex;
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

#videoWrapper {
  position: relative;
  width: min(90vw, 1200px);
  aspect-ratio: 16 / 9;
  background: #000;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 12px 12px 0 rgba(0,0,0,0.3);
  animation: scaleIn 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes scaleIn {
  from { transform: scale(0.8); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

#videoWrapper iframe {
  width: 100%;
  height: 100%;
  border: none;
}

#modalClose {
  position: absolute;
  top: -60px;
  right: 0;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  font-size: 1.8rem;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  box-shadow: 4px 4px 0 rgba(0,0,0,0.2);
}

#modalClose:hover {
  transform: rotate(90deg) scale(1.1);
  box-shadow: 6px 6px 0 rgba(0,0,0,0.3);
}

/* FOOTER */
footer {
  padding: 80px 24px 50px;
  background: #fff;
  border-top: 4px solid var(--pink);
  margin-top: 120px;
  position: relative;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, 
    var(--pink) 0%, 
    var(--orange) 25%, 
    var(--yellow) 50%, 
    var(--green) 75%, 
    var(--blue) 100%
  );
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  justify-content: center;
}

.footer-links a {
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 700;
  transition: all 0.2s;
  padding: 8px 16px;
  border-radius: 100px;
}

.footer-links a:hover {
  background: var(--pink);
  color: #fff;
  transform: translateY(-2px);
}

.footer-bottom {
  text-align: center;
  color: var(--text-light);
  font-size: 0.9rem;
  font-weight: 600;
}

/* DECORATIVE IMAGES */
.decorative-img {
  display: none;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .container {
    padding: 0 12px;
  }

  .section {
    margin-bottom: 36px;
  }

  .hero {
    padding: 50px 16px 40px;
    margin-bottom: 20px;
  }

  .hero::after {
    height: 20px;
  }

  .logo h1 {
    font-size: 2.5rem;
    margin-bottom: 8px;
  }

  .logo .on-beat {
    --beat-rotation: -4deg;
    display: table;
    font-size: 0.35em;
    padding: 6px 12px;
    margin: 10px auto 0;
    transform: rotate(var(--beat-rotation));
  }

  .tagline {
    font-size: 1rem;
  }

  .quick-nav {
    gap: 2px;
    padding: 10px 8px;
    margin: 0 0 20px;
  }

  .section-header {
    margin-bottom: 16px;
  }

  .section-eyebrow {
    font-size: 1.5rem;
    padding: 8px 16px;
  }

  .ios-featured {
    gap: 12px;
  }

  .ios-random-card {
    padding: 20px;
    gap: 14px;
    border-radius: 16px;
  }

  .ios-random-icon {
    width: 50px;
    height: 50px;
    font-size: 26px;
  }

  .ios-random-title {
    font-size: 1.1rem;
  }

  .ios-random-arrow {
    font-size: 2rem;
  }

  .ios-level-grid {
    gap: 10px;
  }

  .ios-level-card {
    padding: 10px;
    border-radius: 14px;
  }

  .ios-level-preview {
    gap: 4px;
    padding: 6px;
    border-radius: 10px;
    margin-bottom: 8px;
  }

  .ios-level-title {
    font-size: 0.75rem;
  }

  .ios-level-more {
    margin-top: 14px;
    padding: 12px;
    font-size: 0.9rem;
  }

  .custom-challenge-section {
    margin: 0 0 24px;
  }

  .custom-challenge-card {
    padding: 24px 18px;
    gap: 16px;
    border-radius: 18px;
  }

  .custom-challenge-icon {
    width: 56px;
    height: 56px;
  }

  .custom-challenge-icon svg {
    width: 28px;
    height: 28px;
  }

  .custom-challenge-content h2 {
    font-size: 1.3rem;
  }

  .custom-challenge-arrow {
    font-size: 2rem;
  }

  .community-preview-grid {
    gap: 10px;
  }

  .video-grid {
    gap: 12px;
  }

  .video-grid .card {
    padding: 8px;
    border-radius: 14px;
  }

  .video-grid .card img {
    border-radius: 10px;
  }

  .video-grid .card h2 {
    font-size: 0.9rem;
  }

  .seo-card {
    padding: 24px 18px;
    border-radius: 18px;
  }

  .seo-card h2 {
    font-size: 1.4rem;
  }

  footer {
    padding: 40px 16px 30px;
    margin-top: 60px;
  }

  footer nav {
    gap: 4px;
    flex-wrap: wrap;
    justify-content: center;
  }

  footer nav a {
    padding: 4px 6px;
    font-size: 0.75rem;
    white-space: nowrap;
  }
}

/* LOADING STATES */
.is-loading {
  opacity: 0.6;
  pointer-events: none;
}

/* ACCESSIBILITY */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* FOCUS STYLES */
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--pink);
  outline-offset: 3px;
  border-radius: 4px;
}

/* SCROLL ANIMATIONS */
@keyframes slideInLeft {
  from { transform: translateX(-50px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes slideInRight {
  from { transform: translateX(50px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* 让每个section有入场动画 */
.section:nth-child(odd) {
  animation: slideInLeft 0.8s ease-out;
}

.section:nth-child(even) {
  animation: slideInRight 0.8s ease-out;
}

/* ===== FIX: TikTok Video Cards (使用原有HTML结构的.card类) ===== */

/* 覆盖之前的通用 .card 样式，针对 video-grid 里的卡片 */
.video-grid .card {
  background: #fff;
  border-radius: 20px;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.1);
  padding: 12px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  transform: rotate(-0.5deg);
  overflow: hidden;
}

.video-grid .card:nth-child(even) {
  transform: rotate(0.5deg);
}

.video-grid .card:hover {
  transform: rotate(0deg) translateY(-8px) scale(1.03);
  box-shadow: 8px 8px 0 rgba(0,0,0,0.15);
}

.video-grid .card img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  border-radius: 12px;
  display: block;
  background: #f0f0f0;
}

.video-grid .card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
}

.video-grid .card h2 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--text);
  margin: 0;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* 修复：热度徽章 - 限制SVG大小 */
.video-grid .heat-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  background: var(--pink);
  color: #fff;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 800;
  flex-shrink: 0;
  white-space: nowrap;
}

.video-grid .heat-badge svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
  flex-shrink: 0;
}

.video-grid .card p {
  font-size: 0.85rem;
  color: var(--text-light);
  margin: 8px 0 12px;
  font-weight: 600;
}

/* 修复：播放按钮 - 限制SVG大小 */
.video-grid .play-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  background: var(--yellow);
  color: var(--text);
  border-radius: 100px;
  font-weight: 800;
  font-size: 0.9rem;
  box-shadow: 0 4px 0 rgba(0,0,0,0.1);
  transition: all 0.2s;
}

.video-grid .play-icon svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.video-grid .card:hover .play-icon {
  transform: translateY(-2px);
  box-shadow: 0 6px 0 rgba(0,0,0,0.15);
}

.video-grid .card:active .play-icon {
  transform: translateY(0);
  box-shadow: 0 2px 0 rgba(0,0,0,0.1);
}

.video-grid .play-text {
  display: none;
}

@media (min-width: 768px) {
  .video-grid .play-text {
    display: inline;
  }
  
  .video-grid .card p {
    display: block;
  }
}

@media (max-width: 767px) {
  .video-grid .card p {
    display: none;
  }
}

/* 视频网格响应式 */
.video-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

@media (min-width: 768px) {
  .video-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
}

@media (min-width: 1200px) {
  .video-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* 视频section标题颜色 */
.video-section .section-eyebrow {
  background: var(--orange);
}

.video-section .section-eyebrow::after {
  background: var(--pink);
}

/* 社区section标题颜色 */
.community-preview-section .section-eyebrow {
  background: var(--blue);
}

.community-preview-section .section-eyebrow::after {
  background: var(--green);
}

/* ===== FIX: Level Card 原始class名称兼容 ===== */
.ios-level-preview-cell {
  border-radius: 10px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  line-height: 1;
  aspect-ratio: 1;
  overflow: hidden;
  transition: transform 0.2s;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.ios-level-card:hover .ios-level-preview-cell {
  transform: scale(1.05) rotate(3deg);
}

.ios-level-preview-cell.is-emoji { font-size: min(10vw, 3.2rem); }
.ios-level-preview-cell img { 
  width: 100%; 
  height: 100%; 
  object-fit: cover; 
  display: block;
  border-radius: 10px;
}

.ios-level-preview-cell.is-cover {
  grid-column: 1 / -1;
  grid-row: 1 / -1;
  aspect-ratio: 1;
}

.ios-difficulty {
  position: absolute;
  left: 8px;
  top: 8px;
  padding: 4px 10px;
  border-radius: 100px;
  font-size: 0.65rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  z-index: 2;
}

.ios-difficulty.easy {
  background: var(--green);
  color: #fff;
}

.ios-difficulty.medium {
  background: var(--yellow);
  color: var(--text);
}

.ios-difficulty.hard {
  background: var(--orange);
  color: #fff;
}

.ios-level-title {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--text);
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 4px;
}

.ios-level-more {
  display: block;
  width: 100%;
  margin-top: 24px;
  padding: 16px;
  background: var(--yellow);
  color: var(--text);
  border-radius: 100px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  cursor: pointer;
  box-shadow: 0 6px 0 rgba(0,0,0,0.1);
  transition: all 0.2s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  grid-column: 1 / -1;
}

.ios-level-more:hover {
  transform: translateY(-3px);
  box-shadow: 0 9px 0 rgba(0,0,0,0.15);
}

.ios-level-more:active {
  transform: translateY(0);
  box-shadow: 0 3px 0 rgba(0,0,0,0.1);
}

/* Word card cells */
.ios-level-preview-cell.is-word-card,
.ios-daily-cell.is-word-card,
.ios-random-mini-cell.is-word-card {
  font-family: var(--font-body);
  text-align: center;
  padding: 0 4px;
}

.ios-word-card-text {
  display: block;
  margin: 0 auto;
  width: 72%;
  max-width: 72%;
  font-weight: 900;
  line-height: 0.88;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.ios-level-preview-cell.is-word-card .ios-word-card-text { font-size: 1.58rem; }
.ios-daily-cell.is-word-card .ios-word-card-text { width: 74%; max-width: 74%; font-size: 1.12rem; }
.ios-random-mini-cell.is-word-card .ios-word-card-text { width: 76%; max-width: 76%; font-size: 0.92rem; }

@supports (font-size: 1cqmin) {
  .ios-level-preview-cell.is-word-card,
  .ios-daily-cell.is-word-card,
  .ios-random-mini-cell.is-word-card { container-type: size; }
  .ios-level-preview-cell.is-word-card .ios-word-card-text { font-size: clamp(1.58rem, 36cqmin, 2.85rem); }
  .ios-daily-cell.is-word-card .ios-word-card-text { font-size: clamp(1.12rem, 19cqmin, 1.72rem); }
  .ios-random-mini-cell.is-word-card .ios-word-card-text { font-size: clamp(0.92rem, 20cqmin, 1.4rem); }
}

/* ===== FIX: Community Card 原始class名称兼容 ===== */
.community-card {
  background: #fff;
  border-radius: 20px;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.1);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  transform: rotate(-0.5deg);
}

.community-card:nth-child(even) {
  transform: rotate(0.5deg);
}

.community-card:hover {
  transform: rotate(0deg) translateY(-8px) scale(1.03);
  box-shadow: 8px 8px 0 rgba(0,0,0,0.15);
}

.community-thumb {
  width: 100%;
  aspect-ratio: 16 / 10;
  background: #f5f5f5;
  border-bottom: none;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.card-fan {
  position: relative;
  width: 45%;
  aspect-ratio: 3 / 4;
  margin-top: 8px;
}

.card-fan .fan-card {
  position: absolute;
  inset: 0;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transform-origin: 50% 95%;
  overflow: hidden;
}

.card-fan .fan-card img { width: 100%; height: 100%; object-fit: cover; }
.card-fan .fan-card.placeholder { display: flex; align-items: center; justify-content: center; color: #999; font-size: 0.85rem; }

.card-fan[data-count="1"] .fan-card:nth-child(1) { transform: rotate(0deg); z-index: 1; }
.card-fan[data-count="2"] .fan-card:nth-child(1) { transform: rotate(-8deg); z-index: 1; }
.card-fan[data-count="2"] .fan-card:nth-child(2) { transform: rotate(8deg); z-index: 2; }
.card-fan[data-count="3"] .fan-card:nth-child(1) { transform: rotate(-10deg); z-index: 1; }
.card-fan[data-count="3"] .fan-card:nth-child(2) { transform: rotate(0deg); z-index: 2; }
.card-fan[data-count="3"] .fan-card:nth-child(3) { transform: rotate(10deg); z-index: 3; }
.card-fan[data-count="4"] .fan-card:nth-child(1) { transform: rotate(-12deg); z-index: 1; }
.card-fan[data-count="4"] .fan-card:nth-child(2) { transform: rotate(-4deg); z-index: 2; }
.card-fan[data-count="4"] .fan-card:nth-child(3) { transform: rotate(4deg); z-index: 3; }
.card-fan[data-count="4"] .fan-card:nth-child(4) { transform: rotate(12deg); z-index: 4; }

.community-body { padding: 16px; }
.community-meta-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.community-meta { font-size: 0.9rem; color: var(--text-light); font-weight: 700; }

.community-heat {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--pink);
  font-size: 0.8rem;
  font-weight: 800;
  flex-shrink: 0;
}

.community-heat svg { width: 14px; height: 14px; fill: currentColor; }

.community-vote-buttons { display: flex; gap: 8px; margin-top: 10px; }

.community-vote-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 6px 12px;
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 800;
  border: none;
  border-radius: 100px;
  cursor: pointer;
  background: #f5f5f5;
  color: var(--text);
  transition: all 0.2s;
}

.community-vote-btn svg { width: 14px; height: 14px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.community-vote-btn:hover { background: #eee; transform: scale(1.05); }
.community-vote-btn.like-btn.voted { background: var(--green); color: #fff; }
.community-vote-btn.like-btn.voted svg { fill: currentColor; }
.community-vote-btn.dislike-btn.voted { background: var(--pink); color: #fff; }
.community-vote-btn.dislike-btn.voted svg { fill: currentColor; }
.community-vote-btn[disabled] { opacity: 0.4; cursor: not-allowed; }

.community-preview-actions { text-align: center; }

/* ===== FIX: Random Modal ===== */
.ios-random-modal {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.ios-random-modal.is-open { display: flex; }

.ios-random-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(10px);
}

.ios-random-panel {
  position: relative;
  width: min(94vw, 380px);
  background: #fff;
  border-radius: 28px;
  box-shadow: 12px 12px 0 rgba(0,0,0,0.15);
  padding: 32px 24px;
  text-align: center;
}

.ios-random-heading {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--text);
  margin-bottom: 20px;
}

.ios-random-grid-wrap {
  width: 260px;
  height: 260px;
  margin: 0 auto 20px;
  position: relative;
}

.ios-random-grid {
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  gap: 8px;
}

.ios-random-selector {
  position: absolute;
  left: 0;
  top: 0;
  border-radius: 12px;
  border: 4px solid var(--pink);
  box-shadow: 0 0 20px rgba(255, 59, 122, 0.5);
  pointer-events: none;
  opacity: 0;
  transition: left 0.08s linear, top 0.08s linear, opacity 0.2s;
}

.ios-random-selector.is-visible { opacity: 1; }

.ios-random-cell {
  border: 0;
  background: transparent;
  padding: 0;
  cursor: default;
  width: 100%;
  height: 100%;
  display: block;
}

.ios-random-cell-inner {
  display: block;
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.5s;
  border-radius: 12px;
}

.ios-random-cell.is-flipped .ios-random-cell-inner { transform: rotateY(180deg); }

.ios-random-face {
  position: absolute;
  inset: 0;
  border-radius: 12px;
  backface-visibility: hidden;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.ios-random-face-back {
  background: #f5f5f5;
}

.ios-random-back-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

.ios-random-back-q {
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--purple);
  opacity: 0.3;
}

.ios-random-face-front {
  transform: rotateY(180deg);
  padding: 5px;
}

.ios-random-mini {
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 3px;
}

.ios-random-mini-cell {
  border-radius: 8px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  aspect-ratio: 1;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.ios-random-mini-cell img { width: 100%; height: 100%; object-fit: cover; display: block; }

.ios-random-controls { display: flex; flex-direction: column; gap: 10px; align-items: center; }

.ios-random-btn {
  width: 220px;
  border-radius: 100px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  padding: 14px;
  cursor: pointer;
  box-shadow: 0 6px 0 rgba(0,0,0,0.1);
  transition: all 0.2s;
}

.ios-random-btn:hover { transform: translateY(-3px); box-shadow: 0 9px 0 rgba(0,0,0,0.15); }
.ios-random-btn:active { transform: translateY(0); box-shadow: 0 3px 0 rgba(0,0,0,0.1); }

.ios-random-btn.spin { background: var(--yellow); color: var(--text); }
.ios-random-btn.play { background: var(--green); color: #fff; display: none; }
.ios-random-btn.play.is-visible { display: inline-block; }
.ios-random-btn.play[hidden] { display: none !important; }

.ios-random-cancel {
  background: transparent;
  color: var(--text-light);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  padding: 8px 16px;
  transition: color 0.2s;
}

.ios-random-cancel:hover { color: var(--text); }
.ios-random-cancel.is-hidden { opacity: 0; pointer-events: none; }
.ios-random-cancel[hidden] { display: none !important; }

/* ===== FIX: Video Modal ===== */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(10px);
}

.modal.active { display: flex; }

.modal-content {
  position: relative;
  width: 90%;
  max-width: 900px;
  aspect-ratio: 16/9;
  display: flex;
  background: #000;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 12px 12px 0 rgba(0,0,0,0.3);
}

.modal-content.tiktok-vertical {
  width: min(90vw, 420px);
  max-width: 420px;
  height: auto;
  max-height: 90vh;
  aspect-ratio: 9 / 16;
}

#videoWrapper { width: 100%; height: 100%; }
.modal-content iframe,
.modal-content video { width: 100%; height: 100%; border: none; }

.modal-close {
  position: absolute;
  top: -56px;
  right: 0;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  font-size: 1.8rem;
  cursor: pointer;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.2);
  transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.modal-close:hover {
  transform: rotate(90deg) scale(1.1);
}

/* ===== FIX: SEO Section ===== */
.seo-section {
  max-width: 800px;
  margin: 0 auto;
}

.seo-card {
  background: #fff;
  border-radius: 24px;
  box-shadow: 6px 6px 0 rgba(0,0,0,0.1);
  padding: 40px;
  transform: rotate(-0.5deg);
}

.seo-card h2 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: var(--text);
  margin-bottom: 16px;
}

.seo-card h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--text);
  margin: 24px 0 12px;
}

.seo-card p {
  font-size: 1rem;
  color: var(--text-light);
  margin-bottom: 16px;
  line-height: 1.8;
  font-weight: 600;
}

.seo-card ol { padding-left: 24px; }
.seo-card li {
  font-size: 1rem;
  color: var(--text-light);
  margin-bottom: 10px;
  line-height: 1.7;
  font-weight: 600;
}

/* ===== FIX: Footer ===== */
footer {
  padding: 60px 24px 40px;
  background: #fff;
  margin-top: 100px;
  position: relative;
  text-align: center;
  width: 100vw;
  margin-left: calc(-50vw + 50%);
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg,
    var(--pink) 0%,
    var(--orange) 25%,
    var(--yellow) 50%,
    var(--green) 75%,
    var(--blue) 100%
  );
}

footer .brand { display: block; margin-bottom: 20px; }
footer .brand-main {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--text);
}
footer .brand-sub {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--pink);
}

footer nav {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

footer nav a {
  color: var(--text-light);
  font-size: 0.9rem;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: 100px;
  transition: all 0.2s;
  white-space: nowrap;
}

@media (max-width: 768px) {
  footer nav {
    gap: 4px;
  }

  footer nav a {
    padding: 4px 6px;
    font-size: 0.75rem;
  }
}

footer nav a:hover {
  background: var(--pink);
  color: #fff;
  transform: translateY(-2px);
}

footer .copyright {
  font-size: 0.8rem;
  color: var(--text-light);
}

/* ===== i18n flash prevention ===== */
html[data-stw-i18n-pending] [data-i18n],
html[data-stw-i18n-pending] [data-i18n-html],
html[data-stw-i18n-pending] [data-i18n-aria-label],
html[data-stw-i18n-pending] [data-i18n-title],
html[data-stw-i18n-pending] [data-i18n-placeholder],
html[data-stw-i18n-pending] [data-i18n-content] {
  visibility: hidden !important;
}

/* bobbeat for JS compat */
@keyframes bobbeat {
  0% { transform: rotate(calc(var(--base-rot, 0deg) - 3deg)); }
  50% { transform: rotate(calc(var(--base-rot, 0deg) + 3deg)); }
  100% { transform: rotate(calc(var(--base-rot, 0deg) - 3deg)); }
}

@keyframes bobbeat-label {
  0% { transform: rotate(-3deg); }
  50% { transform: rotate(3deg); }
  100% { transform: rotate(-3deg); }
}

/* ==========================================================
   RHYTHM & MOTION - 标题区域动感设计
   ========================================================== */

/* 无障碍 */
@media (prefers-reduced-motion: reduce) {
  .logo h1,
  .logo .on-beat,
  .hero::before {
    animation: none !important;
  }
}