/* —— AI 生图 官网 —— */
:root {
  --color-brand: #0f3d38;
  --color-brand-deep: #0a2c28;
  --color-brand-mid: #1a5550;
  --color-bg: #eef1f0;
  --color-bg-soft: #f5f7f6;
  --color-bg-warm: #e8ecea;
  --color-ink: #141816;
  --color-ink-soft: #3d4542;
  --color-muted: #6b7572;
  --color-line: rgba(15, 61, 56, 0.12);
  --color-white: #ffffff;

  --font-display: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3.5rem;
  --space-2xl: 5.5rem;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --header-h: 4rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --max: 72rem;
}

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

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 {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-ink);
  background:
    radial-gradient(120% 80% at 10% -10%, rgba(15, 61, 56, 0.07), transparent 55%),
    radial-gradient(90% 60% at 100% 0%, rgba(26, 85, 80, 0.06), transparent 50%),
    linear-gradient(180deg, var(--color-bg-soft) 0%, var(--color-bg) 40%, var(--color-bg-warm) 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--color-brand);
}

:focus-visible {
  outline: 2px solid var(--color-brand);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100%;
  z-index: 100;
  padding: 0.5rem 1rem;
  background: var(--color-brand);
  color: var(--color-white);
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  top: 0.75rem;
}

/* —— Brand —— */
.brand {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.brand--nav {
  font-size: 1.125rem;
  color: var(--color-brand);
}

.brand--hero {
  margin: 0 0 var(--space-md);
  font-size: clamp(2.75rem, 7vw, 4.75rem);
  line-height: 1.05;
  color: var(--color-brand);
}

.brand--cta {
  margin: 0 0 var(--space-sm);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  color: rgba(255, 255, 255, 0.92);
}

/* —— Header —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(245, 247, 246, 0.86);
  border-bottom: 1px solid var(--color-line);
}

.site-header__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav {
  display: none;
  gap: 1.75rem;
  margin-left: auto;
  font-size: 0.9375rem;
}

.nav a {
  text-decoration: none;
  color: var(--color-ink-soft);
}

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

.site-header__inner > .btn {
  display: none;
  margin-left: 0.5rem;
}

.nav-toggle {
  margin-left: auto;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: transparent;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 1.1rem;
  height: 1.5px;
  background: var(--color-brand);
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 0.5rem 1.5rem 1.25rem;
  border-top: 1px solid var(--color-line);
  background: var(--color-bg-soft);
}

.mobile-nav[hidden] {
  display: none;
}

.mobile-nav a:not(.btn) {
  text-decoration: none;
  padding: 0.5rem 0;
  color: var(--color-ink-soft);
}

@media (min-width: 768px) {
  .nav {
    display: flex;
  }

  .site-header__inner > .btn {
    display: inline-flex;
  }

  .nav-toggle,
  .mobile-nav {
    display: none !important;
  }
}

/* —— Buttons —— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 1.4rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.2;
  text-decoration: none;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.btn--sm {
  padding: 0.55rem 1rem;
  font-size: 0.875rem;
}

.btn--solid {
  background: var(--color-brand);
  color: var(--color-white);
}

.btn--solid:hover {
  background: var(--color-brand-deep);
  color: var(--color-white);
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--color-brand);
  border-color: rgba(15, 61, 56, 0.28);
}

.btn--ghost:hover {
  background: rgba(15, 61, 56, 0.06);
  color: var(--color-brand);
  transform: translateY(-1px);
}

.btn--on-dark {
  background: var(--color-white);
  color: var(--color-brand);
}

.btn--on-dark:hover {
  background: var(--color-bg-soft);
  color: var(--color-brand-deep);
  transform: translateY(-1px);
}

/* —— Hero：一整屏一件事 —— */
.hero {
  min-height: calc(100svh - var(--header-h));
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  background:
    linear-gradient(180deg, var(--color-bg-soft) 0%, rgba(238, 241, 240, 0.92) 28%, transparent 42%),
    linear-gradient(155deg, #0f3d38 32%, #1a5550 62%, #0a2c28 100%);
}

.hero__copy {
  max-width: var(--max);
  width: 100%;
  margin: 0 auto;
  padding: clamp(2rem, 5vw, 3.25rem) 1.5rem 1.25rem;
  position: relative;
  z-index: 2;
  flex: 0 0 auto;
}

.hero__title {
  margin: 0 0 var(--space-md);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.25rem, 2.6vw, 1.75rem);
  line-height: 1.35;
  color: var(--color-ink);
  letter-spacing: 0.01em;
}

.hero__lead {
  margin: 0 0 var(--space-lg);
  max-width: 32rem;
  color: var(--color-ink-soft);
  font-size: 1.0625rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero__visual {
  position: relative;
  flex: 1 1 auto;
  width: 100%;
  min-height: clamp(260px, 42vh, 480px);
}

.hero-stage {
  position: relative;
  max-width: var(--max);
  margin: 0 auto;
  height: 100%;
  min-height: inherit;
  padding: 1.25rem 1.5rem 0;
  display: grid;
  grid-template-columns: 1fr;
  align-items: end;
  justify-items: center;
  gap: 1rem;
}

.hero-stage__glow {
  position: absolute;
  inset: 10% 20% auto;
  height: 40%;
  background: radial-gradient(ellipse, rgba(255, 255, 255, 0.12), transparent 70%);
  pointer-events: none;
}

/* Phone mock — 产品界面示意 */
.phone-mock {
  position: relative;
  z-index: 2;
  width: min(260px, 72vw);
  aspect-ratio: 9 / 16;
  background: #0d2e2a;
  border-radius: 28px;
  padding: 10px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.28);
  transform: translateY(12%);
}

.phone-mock__notch {
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  width: 36%;
  height: 8px;
  background: #061916;
  border-radius: 8px;
  z-index: 3;
}

.phone-mock__screen {
  height: 100%;
  border-radius: 20px;
  background: linear-gradient(180deg, #f5f7f6 0%, #e8ecea 100%);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  padding: 1.6rem 0.85rem 0.85rem;
  gap: 0.65rem;
}

.mock-bar {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.mock-bar span:first-child {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-brand);
}

.mock-bar__sub {
  font-size: 0.7rem;
  color: var(--color-muted);
}

.mock-chips {
  display: flex;
  gap: 0.35rem;
}

.mock-chips span {
  font-size: 0.62rem;
  padding: 0.28rem 0.5rem;
  border-radius: 4px;
  background: rgba(15, 61, 56, 0.06);
  color: var(--color-ink-soft);
}

.mock-chips .is-on {
  background: var(--color-brand);
  color: var(--color-white);
}

.mock-prompt {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: 8px;
  padding: 0.55rem 0.65rem;
}

.mock-prompt p {
  margin: 0;
  font-size: 0.62rem;
  line-height: 1.45;
  color: var(--color-ink-soft);
}

.mock-grid {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem;
  min-height: 0;
}

.mock-tile {
  border-radius: 8px;
  min-height: 0;
}

.mock-tile--a {
  background:
    linear-gradient(160deg, #c4a574 0%, #8b6b4a 40%, #3d2e22 100%);
}

.mock-tile--b {
  background:
    linear-gradient(200deg, #7a9e8e 0%, #2f5548 55%, #1a3330 100%);
}

.mock-tile--c {
  background:
    linear-gradient(40deg, #d4cfc6 0%, #9aa8a4 50%, #4a5c58 100%);
}

.mock-tile--d {
  background:
    linear-gradient(120deg, #e8d5c4 0%, #b8957a 45%, #5c4033 100%);
}

/* Result wall — 生成结果墙占位 */
.result-wall {
  display: none;
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.wall-shot {
  margin: 0;
  position: absolute;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.22);
}

.wall-shot__img {
  width: 100%;
  height: 100%;
}

/* 占位图：人像 / 产品 / 场景 — 上线后替换为真实生成图 */
.wall-shot__img--portrait {
  background:
    radial-gradient(ellipse 60% 50% at 50% 28%, #e8c4a8 0%, transparent 55%),
    linear-gradient(180deg, #2a4540 0%, #1a2e2b 40%, #0f1f1c 100%);
}

.wall-shot__img--product {
  background:
    radial-gradient(circle at 50% 55%, #ffffff 0%, #e8ecea 35%, transparent 55%),
    linear-gradient(160deg, #dfe6e3 0%, #a8b8b3 100%);
}

.wall-shot__img--scene {
  background:
    linear-gradient(180deg, #6b8f9e 0%, #3d6a5c 45%, #1e3d36 100%);
}

.wall-shot--1 {
  width: 160px;
  height: 210px;
  left: 6%;
  bottom: 18%;
  transform: rotate(-6deg);
}

.wall-shot--2 {
  width: 140px;
  height: 140px;
  right: 8%;
  top: 18%;
  transform: rotate(5deg);
}

.wall-shot--3 {
  width: 150px;
  height: 190px;
  right: 4%;
  bottom: 12%;
  transform: rotate(3deg);
}

@media (min-width: 900px) {
  .hero__copy {
    padding-bottom: 1.5rem;
  }

  .hero__visual {
    min-height: 0;
  }

  .hero-stage {
    grid-template-columns: 1fr auto 1fr;
    justify-items: stretch;
    padding-top: 1.5rem;
  }

  .phone-mock {
    grid-column: 2;
    width: 280px;
    transform: translateY(6%);
  }

  .result-wall {
    display: block;
  }
}

/* Hero 入场 */
.reveal-hero {
  opacity: 0;
  transform: translateY(28px);
  animation: heroIn 0.9s var(--ease) 0.15s forwards;
}

@keyframes heroIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* —— Sections —— */
.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: var(--space-2xl) 1.5rem;
}

.section__head {
  max-width: 36rem;
  margin-bottom: var(--space-xl);
}

.section__head h2 {
  margin: 0 0 var(--space-sm);
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.35rem);
  font-weight: 600;
  color: var(--color-brand);
  letter-spacing: 0.01em;
}

.section__head p {
  margin: 0;
  color: var(--color-ink-soft);
}

/* M03 能力 Bento */
.bento {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
  grid-template-columns: 1fr;
}

.bento__cell {
  margin: 0;
  padding: 1.35rem 1.25rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.55);
  transition: transform 0.25s var(--ease), background 0.25s var(--ease);
}

.bento__cell:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.85);
}

.bento__cell--accent {
  background: rgba(15, 61, 56, 0.06);
}

.bento__index {
  display: block;
  margin-bottom: 0.65rem;
  font-family: var(--font-display);
  font-size: 0.875rem;
  color: var(--color-muted);
}

.bento__cell h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-ink);
}

.bento__cell p {
  margin: 0 0 0.85rem;
  color: var(--color-ink-soft);
  font-size: 0.9375rem;
}

.bento__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-brand);
  text-decoration: none;
}

.bento__link:hover {
  text-decoration: underline;
}

.feature-note {
  margin: var(--space-lg) 0 0;
  color: var(--color-muted);
  font-size: 0.9375rem;
}

@media (min-width: 720px) {
  .bento {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* M04 悬停预览 */
.preview-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}

.preview-card {
  margin: 0;
}

.preview-card__stage {
  position: relative;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-line);
  margin-bottom: 0.85rem;
  background: #1a3330;
}

.preview-card__stage .frame {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.35s var(--ease);
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  padding: 0.85rem;
}

.frame__label {
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.4);
  color: #fff;
  font-size: 0.7rem;
}

.preview-card__stage .frame--1 {
  opacity: 1;
}

.preview-card__hint {
  position: absolute;
  left: 0.75rem;
  bottom: 0.75rem;
  z-index: 2;
  padding: 0.3rem 0.55rem;
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.45);
  color: #fff;
  font-size: 0.7rem;
  pointer-events: none;
}

.preview-card__bar {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  height: 3px;
  width: 0;
  background: rgba(255, 255, 255, 0.85);
}

.preview-card h3 {
  margin: 0 0 0.3rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
}

.preview-card p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-ink-soft);
}

/* 帧色（mock） */
.frame--tpl-a {
  background: linear-gradient(145deg, #d8e0dc, #5a7a72 55%, #1a3330);
}
.frame--tpl-b {
  background:
    linear-gradient(180deg, transparent 40%, rgba(0, 0, 0, 0.25)),
    linear-gradient(160deg, #c4a574, #3d2e22);
}
.frame--tpl-c {
  background:
    radial-gradient(circle at 50% 40%, #e5c4a8, transparent 50%),
    linear-gradient(165deg, #2f5548, #0f3d38);
}
.frame--album-a {
  background:
    radial-gradient(ellipse at 50% 30%, #e8c4a8, transparent 55%),
    linear-gradient(180deg, #4a5c58, #1a2e2a);
}
.frame--album-b {
  background:
    linear-gradient(90deg, #c4a574 0%, #c4a574 32%, #7a9e8e 33%, #7a9e8e 66%, #8b6b4a 67%, #8b6b4a 100%);
}
.frame--album-c {
  background:
    linear-gradient(135deg, #2a4a44 0%, #c4a882 45%, #1a3330 100%);
}
.frame--remix-a {
  background: linear-gradient(200deg, #9aa8a4, #3d4542);
}
.frame--remix-b {
  background: linear-gradient(200deg, #5a7a9e, #1a2a3d);
}
.frame--remix-c {
  background: linear-gradient(200deg, #8b5a3c, #2a1810);
}

@keyframes previewFrames {
  0%,
  28% {
    opacity: 1;
  }
  33%,
  100% {
    opacity: 0;
  }
}

@keyframes previewFrames2 {
  0%,
  28% {
    opacity: 0;
  }
  33%,
  61% {
    opacity: 1;
  }
  66%,
  100% {
    opacity: 0;
  }
}

@keyframes previewFrames3 {
  0%,
  61% {
    opacity: 0;
  }
  66%,
  95% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}

@keyframes previewBar {
  from {
    width: 0;
  }
  to {
    width: 100%;
  }
}

.preview-card:hover .frame--1,
.preview-card.is-playing .frame--1,
.preview-card:focus-visible .frame--1 {
  animation: previewFrames 2.4s var(--ease) infinite;
}

.preview-card:hover .frame--2,
.preview-card.is-playing .frame--2,
.preview-card:focus-visible .frame--2 {
  animation: previewFrames2 2.4s var(--ease) infinite;
}

.preview-card:hover .frame--3,
.preview-card.is-playing .frame--3,
.preview-card:focus-visible .frame--3 {
  animation: previewFrames3 2.4s var(--ease) infinite;
}

.preview-card:hover .preview-card__bar,
.preview-card.is-playing .preview-card__bar,
.preview-card:focus-visible .preview-card__bar {
  animation: previewBar 2.4s linear infinite;
}

.preview-card:hover .preview-card__hint,
.preview-card.is-playing .preview-card__hint,
.preview-card:focus-visible .preview-card__hint {
  opacity: 0;
}

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

@media (prefers-reduced-motion: reduce) {
  .preview-card:hover .frame--1,
  .preview-card.is-playing .frame--1 {
    animation: none;
    opacity: 0;
  }

  .preview-card:hover .frame--2,
  .preview-card.is-playing .frame--2 {
    animation: none;
    opacity: 1;
  }

  .preview-card:hover .frame--3,
  .preview-card.is-playing .frame--3 {
    animation: none;
    opacity: 0;
  }

  .preview-card:hover .preview-card__bar,
  .preview-card.is-playing .preview-card__bar {
    animation: none;
    width: 100%;
  }
}

/* M05 受众切换 */
.audience-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.audience-tab {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 0.55rem 1rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.5);
  color: var(--color-ink-soft);
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.audience-tab:hover {
  color: var(--color-brand);
  border-color: rgba(15, 61, 56, 0.28);
}

.audience-tab.is-active {
  background: var(--color-brand);
  border-color: var(--color-brand);
  color: var(--color-white);
}

.audience-panel {
  display: none;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  padding: 1.5rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.55);
}

.audience-panel.is-active {
  display: grid;
}

.audience-panel[hidden] {
  display: none !important;
}

.audience-panel__copy h3 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-ink);
}

.audience-panel__copy ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.65rem;
}

.audience-panel__copy li {
  position: relative;
  padding-left: 1rem;
  color: var(--color-ink-soft);
  font-size: 0.975rem;
}

.audience-panel__copy li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-brand);
}

.audience-panel__visual {
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-line);
}

.audience-panel__visual--personal {
  background:
    radial-gradient(ellipse at 40% 35%, #e5c4a8, transparent 50%),
    linear-gradient(160deg, #7a9e8e, #1a3330);
}

.audience-panel__visual--commerce {
  background:
    radial-gradient(circle at 50% 55%, #fff 0%, #eef1f0 30%, transparent 50%),
    linear-gradient(145deg, #c5d0cb, #5a6e68);
}

.audience-panel__visual--ops {
  background: linear-gradient(125deg, #0f3d38 0%, #2a4a44 40%, #c4a882 100%);
}

@media (min-width: 768px) {
  .audience-panel.is-active {
    grid-template-columns: 1.1fr 1fr;
    align-items: center;
  }
}

/* M06 作品墙 */
.gallery-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
  grid-template-columns: repeat(2, 1fr);
}

.gallery-item {
  margin: 0;
}

.gallery-item__stage {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-line);
  margin-bottom: 0.45rem;
}

.gallery-item__stage--tall {
  aspect-ratio: 9 / 14;
}

.gallery-item__stage--poster {
  aspect-ratio: 3 / 4;
}

.gallery-item__stage--wide {
  aspect-ratio: 16 / 9;
}

.gallery-item__img {
  position: absolute;
  inset: 0;
  transition: opacity 0.35s var(--ease), transform 0.3s var(--ease);
}

.gallery-item__img:last-child {
  opacity: 0;
}

.gallery-item:hover .gallery-item__img:first-child,
.gallery-item.is-playing .gallery-item__img:first-child,
.gallery-item:focus-visible .gallery-item__img:first-child {
  opacity: 0;
}

.gallery-item:hover .gallery-item__img:last-child,
.gallery-item.is-playing .gallery-item__img:last-child,
.gallery-item:focus-visible .gallery-item__img:last-child {
  opacity: 1;
  transform: scale(1.03);
}

.gallery-item span {
  display: block;
  font-size: 0.8125rem;
  color: var(--color-ink-soft);
}

.gallery-item small {
  font-size: 0.7rem;
  color: var(--color-muted);
}

.gallery-note {
  margin: var(--space-lg) 0 0;
  font-size: 0.875rem;
  color: var(--color-muted);
}

.gallery-item__img--id {
  background: radial-gradient(ellipse at 50% 35%, #e5c4a8, transparent 55%), linear-gradient(165deg, #3d5c56, #1a3330);
}
.gallery-item__img--id-b {
  background: radial-gradient(ellipse at 48% 38%, #f0d2b8, transparent 55%), linear-gradient(165deg, #4a7068, #0f3d38);
}
.gallery-item__img--selfie {
  background: linear-gradient(200deg, #e8d5c4, #b8957a 45%, #5c4033);
}
.gallery-item__img--selfie-b {
  background: linear-gradient(200deg, #f2e0d0, #c4a090 45%, #4a3028);
}
.gallery-item__img--wall {
  background: linear-gradient(200deg, #8fb4c4, #4a7a6e 40%, #1e3d36);
}
.gallery-item__img--wall-b {
  background: linear-gradient(200deg, #a8c8d4, #5a8a7a 40%, #0f3d38);
}
.gallery-item__img--product {
  background: radial-gradient(circle at 50% 58%, #fff 0%, #eef1f0 28%, transparent 48%), linear-gradient(145deg, #d5ddd9, #8a9a94);
}
.gallery-item__img--product-b {
  background: radial-gradient(circle at 50% 55%, #fff 0%, #f5f7f6 25%, transparent 48%), linear-gradient(145deg, #e8ecea, #6a7e78);
}
.gallery-item__img--poster {
  background: linear-gradient(125deg, #2a4a44, #0f3d38 50%, #c4a882);
}
.gallery-item__img--poster-b {
  background: linear-gradient(125deg, #1a3330, #0a2c28 50%, #d4b892);
}
.gallery-item__img--cover {
  background: linear-gradient(90deg, #1a3330, #4a7a6e 50%, #c4a882);
}
.gallery-item__img--cover-b {
  background: linear-gradient(90deg, #0f3d38, #5a8a7a 50%, #d4b892);
}
.gallery-item__img--sticker {
  background: radial-gradient(circle at 30% 40%, #e8b89a, transparent 45%), radial-gradient(circle at 70% 60%, #7a9e8e, transparent 40%), linear-gradient(180deg, #f0ebe4, #c5d0cb);
}
.gallery-item__img--sticker-b {
  background: radial-gradient(circle at 35% 45%, #f0c8a8, transparent 45%), radial-gradient(circle at 65% 55%, #8ab0a0, transparent 40%), linear-gradient(180deg, #f8f4ee, #b8c8c0);
}
.gallery-item__img--album {
  background: linear-gradient(135deg, #2a4a44, #c4a882 45%, #1a3330);
}
.gallery-item__img--album-b {
  background: linear-gradient(135deg, #1a3330, #d4b892 45%, #0f3d38);
}

@media (min-width: 640px) {
  .gallery-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* 模块跳转坞 */
.module-dock {
  position: fixed;
  right: 0.75rem;
  bottom: 1rem;
  z-index: 40;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.45rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-line);
  background: rgba(245, 247, 246, 0.92);
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 24px rgba(15, 61, 56, 0.08);
}

.module-dock a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 2.4rem;
  height: 1.75rem;
  padding: 0 0.35rem;
  border-radius: 4px;
  font-size: 0.65rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--color-ink-soft);
}

.module-dock a:hover,
.module-dock a.is-active {
  background: var(--color-brand);
  color: var(--color-white);
}

.module-dock__all {
  border-top: 1px solid var(--color-line);
  margin-top: 0.15rem;
  padding-top: 0.35rem !important;
  height: auto !important;
  min-height: 1.75rem;
}

@media (max-width: 719px) {
  .module-dock {
    right: 0.5rem;
    left: 0.5rem;
    bottom: 0.5rem;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }

  .module-dock__all {
    border-top: none;
    border-left: 1px solid var(--color-line);
    margin-top: 0;
    margin-left: 0.15rem;
    padding-top: 0 !important;
    padding-left: 0.5rem !important;
  }
}

/* 模块目录 / 单页壳 */
.mod-shell {
  min-height: 100svh;
}

.mod-shell__bar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  padding: 0.85rem 1.5rem;
  background: rgba(245, 247, 246, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-line);
}

.mod-shell__bar a {
  text-decoration: none;
  font-size: 0.875rem;
  color: var(--color-ink-soft);
}

.mod-shell__bar a:hover {
  color: var(--color-brand);
}

.mod-shell__badge {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--color-brand);
}

.mod-shell__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-ink);
}

.mod-shell__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-left: auto;
}

.mod-shell__nav a {
  padding: 0.25rem 0.45rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  border: 1px solid var(--color-line);
}

.mod-shell__nav a.is-current {
  background: var(--color-brand);
  border-color: var(--color-brand);
  color: #fff;
}

.mod-catalog {
  max-width: var(--max);
  margin: 0 auto;
  padding: var(--space-xl) 1.5rem var(--space-2xl);
}

.mod-catalog__head h1 {
  margin: 0 0 var(--space-sm);
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  color: var(--color-brand);
}

.mod-catalog__head p {
  margin: 0 0 var(--space-xl);
  color: var(--color-ink-soft);
  max-width: 36rem;
}

.mod-catalog__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
  grid-template-columns: 1fr;
}

.mod-catalog__card {
  display: block;
  padding: 1.25rem 1.2rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  color: inherit;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease);
}

.mod-catalog__card:hover {
  transform: translateY(-2px);
  background: #fff;
  color: inherit;
}

.mod-catalog__card strong {
  display: block;
  margin-bottom: 0.35rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--color-brand);
}

.mod-catalog__card span {
  font-size: 0.875rem;
  color: var(--color-ink-soft);
}

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

@media (min-width: 960px) {
  .mod-catalog__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.mod-demo-pad {
  padding-bottom: 4rem;
}

.mod-demo-pad .site-header {
  position: relative;
}

.mod-demo-note {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem 1.5rem 0;
  font-size: 0.875rem;
  color: var(--color-muted);
}

/* Scenes */
.scenes {
  background: transparent;
}

.scene-grid {
  display: grid;
  gap: 2rem 1.5rem;
  grid-template-columns: 1fr;
}

.scene {
  margin: 0;
}

.scene__visual {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  border: 1px solid var(--color-line);
}

/* 场景占位图 — 上线替换为真实示意截图 */
.scene__visual--avatar {
  background:
    radial-gradient(ellipse 45% 40% at 50% 35%, #e5c4a8, transparent 60%),
    linear-gradient(165deg, #3d5c56 0%, #1a3330 100%);
}

.scene__visual--wallpaper {
  background:
    linear-gradient(200deg, #8fb4c4 0%, #4a7a6e 40%, #1e3d36 100%);
}

.scene__visual--commerce {
  background:
    radial-gradient(circle at 50% 58%, #fff 0%, #eef1f0 28%, transparent 48%),
    linear-gradient(145deg, #d5ddd9, #8a9a94);
}

.scene__visual--poster {
  background:
    linear-gradient(125deg, #2a4a44 0%, #0f3d38 50%, #c4a882 100%);
}

.scene__visual--fun {
  background:
    radial-gradient(circle at 30% 40%, #e8b89a 0%, transparent 45%),
    radial-gradient(circle at 70% 60%, #7a9e8e 0%, transparent 40%),
    linear-gradient(180deg, #f0ebe4, #c5d0cb);
}

.scene h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
}

.scene p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-ink-soft);
}

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

@media (min-width: 960px) {
  .scene-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .scene:nth-child(4),
  .scene:nth-child(5) {
    grid-column: span 1;
  }
}

/* Steps */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.75rem;
  counter-reset: none;
}

.step {
  display: grid;
  grid-template-columns: 2.75rem 1fr;
  gap: 1rem;
  align-items: start;
}

.step__num {
  width: 2.75rem;
  height: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--color-brand);
  color: var(--color-white);
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
}

.step h3 {
  margin: 0.2rem 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
}

.step p {
  margin: 0;
  color: var(--color-ink-soft);
}

@media (min-width: 768px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }

  .step {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}

/* Upcoming tools */
.tool-row {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.tool {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.15rem 1.1rem;
  border-top: 1px solid var(--color-line);
  background: rgba(255, 255, 255, 0.35);
}

.tool span {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--color-ink);
}

.tool em {
  font-style: normal;
  font-size: 0.8125rem;
  color: var(--color-muted);
}

@media (min-width: 768px) {
  .tool-row {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* CTA band */
.cta-band {
  margin: 0;
  padding: var(--space-2xl) 1.5rem;
  background: linear-gradient(145deg, var(--color-brand-deep) 0%, var(--color-brand) 48%, var(--color-brand-mid) 100%);
  color: var(--color-white);
}

.cta-band__inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

.cta-band__copy h2 {
  margin: 0 0 var(--space-md);
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  color: var(--color-white);
}

.cta-band__copy p:last-child {
  margin: 0;
  max-width: 28rem;
  color: rgba(255, 255, 255, 0.78);
}

.cta-band__qr {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
}

.qr-placeholder {
  width: 168px;
  height: 168px;
  border: 1.5px dashed rgba(255, 255, 255, 0.45);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.06);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  text-align: center;
}

.qr-placeholder span {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
}

.qr-placeholder small {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.55);
}

@media (min-width: 768px) {
  .cta-band__inner {
    grid-template-columns: 1fr auto;
    gap: 3rem;
  }

  .cta-band__qr {
    align-items: center;
  }
}

/* Footer */
.site-footer {
  padding: 2.5rem 1.5rem;
  border-top: 1px solid var(--color-line);
  background: var(--color-bg-soft);
}

.site-footer__inner {
  max-width: var(--max);
  margin: 0 auto;
}

.site-footer__brand {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-brand);
}

.site-footer__meta {
  margin: 0 0 0.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  font-size: 0.875rem;
  color: var(--color-ink-soft);
}

.site-footer__meta a {
  text-decoration: none;
}

.site-footer__meta a:hover {
  text-decoration: underline;
}

.site-footer__beian {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.site-footer__beian a {
  color: inherit;
  text-decoration: none;
}

.site-footer__beian a:hover {
  text-decoration: underline;
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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