/* 首页的样式：hero、简介、功能、工作原理、开源与参与、常见问题与收尾的下载区 */

/* ==========================================
   设计 token
   ========================================== */

:root {
  /* 示意图里的 tile 与面板 */
  --art-surface: #FFFFFF;
  --art-dock: rgb(255 255 255 / 72%);
  --art-muted: rgb(34 45 62 / 10%);
  --art-sky: #8FD5F8;
  --art-sun: var(--sun);
  --art-sea: #2E9FD0;
  --art-folder: #7CCBF4;
  --art-cursor-fill: var(--ink);
  --art-cursor-stroke: #FFFFFF;
}

@media (prefers-color-scheme: dark) {
  :root {
    --art-surface: #0E2A54;
    --art-dock: rgb(180 218 247 / 10%);
    --art-muted: rgb(180 218 247 / 14%);
    --art-sky: #B4DAF7;
    --art-sun: var(--sun);
    --art-sea: #3D86CC;
    --art-folder: #5DA9E6;
    --art-cursor-fill: #F5F7FC;
    --art-cursor-stroke: #031536;
  }
}

/* ==========================================
   Hero
   ========================================== */

.hero {
  padding-top: calc(var(--nav-height) + clamp(48px, 7vw, 104px));
  padding-bottom: clamp(120px, 13vw, 184px);
}

/* 日或月的柔光：从截图的右上角后面探出来 */
.hero-orb {
  position: absolute;
  top: -240px;
  right: -170px;
  z-index: -1;
  width: 440px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, var(--orb-glow) 0%, transparent 68%);
}

.hero-orb::before {
  content: "";
  position: absolute;
  inset: 27%;
  border-radius: 50%;
  background: radial-gradient(
    circle at 40% 36%,
    #FFE9AE 0%,
    #FFD575 45%,
    var(--orb-core) 100%
  );
  box-shadow:
    0 0 40px 4px rgb(254 197 80 / 45%),
    0 0 140px 30px var(--orb-glow);
  opacity: 0.92;
}

/* 深色：圆盘裁成一弯新月 */
@media (prefers-color-scheme: dark) {
  .hero-orb::before {
    background: linear-gradient(
      210deg,
      #FFFFFF 0%,
      var(--orb-core) 45%,
      #B4DAF7 100%
    );
    box-shadow: none;
    -webkit-mask-image: radial-gradient(
      ellipse 41% 41% at 33% 36%,
      transparent 98%,
      #000 100%
    );
    mask-image: radial-gradient(
      ellipse 41% 41% at 33% 36%,
      transparent 98%,
      #000 100%
    );
  }
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  align-items: center;
  gap: clamp(40px, 6vw, 88px);
}

.hero-copy {
  display: grid;
  justify-items: start;
  gap: 28px;
}

.hero-title {
  font-size: clamp(2.75rem, 1.6rem + 4.2vw, 5rem);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

.hero-title:lang(zh) {
  font-weight: 760;
  line-height: 1.2;
  letter-spacing: 0.01em;
}

.hero-lead {
  max-width: var(--measure);
  color: var(--color-text-secondary);
  font-size: clamp(1.125rem, 1.04rem + 0.4vw, 1.375rem);
  line-height: 1.6;
}

.hero-lead:lang(zh) {
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.hero-meta {
  margin-top: -6px;
}

.hero-whats-new {
  margin-top: -18px;
  font-size: 0.9375rem;
  font-weight: 600;
}

.hero-whats-new a {
  text-decoration: none;
}

.hero-whats-new a:hover {
  text-decoration: underline;
}

.hero-visual {
  position: relative;
  justify-self: center;
}

/* 截图像面板从 Dock 上方弹出那样，以底边中点为原点放大淡入 */
.hero-shot {
  width: 482px;
  border-radius: 22px;
  box-shadow:
    0 0 0 1px var(--color-border),
    var(--shadow-float);
  transform-origin: 50% 100%;
}

@media (prefers-reduced-motion: no-preference) {
  .hero-shot {
    animation: panel-pop 0.9s var(--ease-spring) 0.15s both;
  }

  .hero-copy {
    animation: hero-copy-in 0.9s var(--ease-out) both;
  }
}

@keyframes panel-pop {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
}

@keyframes hero-copy-in {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
}

@media (max-width: 899px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 56px;
  }

  .hero-shot {
    width: min(100%, 420px);
  }
}

/* ==========================================
   简介
   ========================================== */

.about {
  padding-top: clamp(48px, 6vw, 88px);
}

.about-statement {
  max-width: 23em;
  margin-top: 20px;
  font-size: clamp(1.625rem, 1.15rem + 2vw, 2.75rem);
  font-weight: 720;
  line-height: 1.25;
  letter-spacing: -0.024em;
  text-wrap: pretty;
}

/* 这段标题是整句陈述，像正文那样逐字换行，不按词组 */
.about-statement:lang(zh) {
  line-height: 1.45;
  letter-spacing: 0;
  word-break: normal;
}

.about-statement-muted {
  color: var(--color-text-secondary);
  font-weight: 600;
}

/* Dock 的示意：左侧 App 区域里的组与上方展开的面板，右侧是原生的 Dock 文件夹 */
.dock-diagram {
  margin-top: clamp(48px, 7vw, 88px);
}

.dock-diagram-art {
  width: 100%;
  height: auto;
  overflow: visible;
}

.diagram-dock {
  fill: var(--art-dock);
  stroke: var(--color-border-strong);
  stroke-width: 1.5;
}

.diagram-panel {
  fill: var(--art-surface);
  stroke: var(--color-border-strong);
  stroke-width: 1.5;
  filter: drop-shadow(0 18px 24px rgb(22 36 60 / 16%));
}

.diagram-muted {
  fill: var(--art-muted);
}

.diagram-sky {
  fill: var(--art-sky);
}

.diagram-sun {
  fill: var(--art-sun);
}

.diagram-sea {
  fill: var(--art-sea);
}

.diagram-group {
  fill: var(--art-surface);
  stroke: var(--sun);
  stroke-width: 2.5;
}

.diagram-folder {
  fill: var(--art-surface);
  stroke: var(--color-border-strong);
  stroke-width: 1.5;
}

.diagram-folder-mark {
  fill: var(--art-folder);
}

.diagram-divider {
  stroke: var(--color-border-strong);
  stroke-width: 2;
  stroke-linecap: round;
}

/* 示意图下方的两段标注，各自对齐 Dock 的一个区域 */
.dock-diagram-labels {
  display: grid;
  grid-template-columns: 64.6% 22.9%;
  margin-top: 18px;
  margin-left: 6.25%;
}

.dock-diagram-label {
  display: grid;
  gap: 2px;
  padding-top: 14px;
  border-top: 2px solid var(--color-border-strong);
  text-align: center;
}

.dock-diagram-label-groups {
  margin-right: 12px;
  border-top-color: var(--sun);
}

.dock-diagram-label-folders {
  margin-left: 12px;
}

.dock-diagram-label strong {
  font-size: 1.0625rem;
}

.dock-diagram-label span {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
}

.about-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(28px, 4vw, 56px);
  margin-top: clamp(56px, 7vw, 96px);
  list-style: none;
}

.about-points li {
  display: grid;
  align-content: start;
  gap: 16px;
}

.about-points p {
  max-width: var(--measure);
  color: var(--color-text-secondary);
}

@media (max-width: 767px) {
  .dock-diagram-labels {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
    margin-left: 0;
  }

  .dock-diagram-label {
    margin: 0;
    padding: 0 0 0 16px;
    border-top: 0;
    border-left: 3px solid var(--color-border-strong);
    text-align: left;
  }

  .dock-diagram-label-groups {
    margin: 0;
    border-left-color: var(--sun);
  }

  .about-points {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ==========================================
   功能
   ========================================== */

.features {
  padding-top: 0;
}

.feature-row {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  align-items: center;
  gap: clamp(40px, 6vw, 96px);
  padding-block: clamp(24px, 4vw, 56px);
}

.feature-row + .feature-row {
  margin-top: clamp(40px, 5vw, 72px);
}

.feature-row-reverse {
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
}

.feature-row-reverse .feature-copy {
  order: 2;
}

.feature-copy {
  display: grid;
  justify-items: start;
  gap: 18px;
}

.feature-copy > p {
  max-width: var(--measure);
  color: var(--color-text-secondary);
  font-size: 1.125rem;
}

.feature-title {
  margin-top: 6px;
  font-size: clamp(1.75rem, 1.3rem + 1.5vw, 2.5rem);
  font-weight: 760;
  line-height: 1.15;
  letter-spacing: -0.026em;
}

/* 中文标题字面更满，字号收小一档，宽屏上一行放得下 */
.feature-title:lang(zh) {
  font-size: clamp(1.75rem, 1.3rem + 1.2vw, 2.25rem);
  line-height: 1.3;
  letter-spacing: 0;
}

.feature-subtitle {
  margin-top: 10px;
  font-size: 1.0625rem;
  font-weight: 680;
}

.feature-media img {
  width: 100%;
}

.feature-media-settings {
  padding: clamp(8px, 2.5vw, 32px);
}

.feature-media-settings img {
  max-width: 600px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: clamp(72px, 9vw, 128px);
  list-style: none;
}

.feature-card {
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 28px 28px 32px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background: var(--color-bg-raised);
  box-shadow: var(--shadow-card);
}

.feature-card h3 {
  margin-top: 10px;
  font-size: 1.1875rem;
  font-weight: 680;
  line-height: 1.35;
}

.feature-card p {
  color: var(--color-text-secondary);
  font-size: 1rem;
  line-height: 1.7;
}

@media (max-width: 1023px) {
  .feature-row,
  .feature-row-reverse {
    grid-template-columns: minmax(0, 1fr);
    gap: 36px;
  }

  .feature-row-reverse .feature-copy {
    order: 0;
  }

  .feature-copy {
    max-width: 40rem;
  }

  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 639px) {
  .feature-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .feature-card {
    padding: 24px;
  }
}

/* ==========================================
   工作原理与对系统的改动
   ========================================== */

.how {
  background: var(--color-bg-sunken);
}

.how-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  list-style: none;
}

.how-step {
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 16px 16px 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background: var(--color-bg-raised);
  box-shadow: var(--shadow-card);
}

.how-step h3,
.how-step p {
  padding-inline: 12px;
}

.how-step h3 {
  font-size: 1.1875rem;
  font-weight: 680;
  line-height: 1.4;
}

.how-step p {
  color: var(--color-text-secondary);
  font-size: 1rem;
}

.how-number {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  margin: 8px 12px 0;
  border-radius: 50%;
  background: var(--color-button-bg);
  color: var(--color-button-text);
  font-size: 0.875rem;
  font-weight: 700;
}

.how-art {
  width: 100%;
  height: auto;
  border-radius: 16px;
  background:
    linear-gradient(180deg, var(--color-tint-sky), transparent),
    var(--color-bg-sunken);
}

.art-dock {
  fill: var(--art-dock);
  stroke: var(--color-border-strong);
  stroke-width: 1.25;
}

.art-muted {
  fill: var(--art-muted);
}

.art-sky {
  fill: var(--art-sky);
}

.art-sun {
  fill: var(--art-sun);
}

.art-sea {
  fill: var(--art-sea);
}

.art-group {
  fill: var(--art-surface);
  stroke: var(--sun);
  stroke-width: 2.5;
}

.art-ripple {
  fill: none;
  stroke: var(--sun);
  stroke-width: 2;
  opacity: 0.55;
  transform-box: fill-box;
  transform-origin: center;
}

.art-cursor {
  fill: var(--art-cursor-fill);
  stroke: var(--art-cursor-stroke);
  stroke-width: 1.5;
  stroke-linejoin: round;
}

.art-pill {
  fill: var(--color-button-bg);
}

.art-pill-text {
  fill: var(--color-button-text);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
}

.art-arrow {
  fill: none;
  stroke: var(--color-text-secondary);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.art-placeholder {
  fill: var(--art-surface);
  stroke: var(--color-border-strong);
  stroke-width: 1.5;
  stroke-dasharray: 5 4;
}

.art-panel {
  fill: var(--art-surface);
  stroke: var(--color-border-strong);
  stroke-width: 1.25;
}

/* 点击 tile 时的涟漪 */
@media (prefers-reduced-motion: no-preference) {
  .art-ripple {
    animation: ripple 2.6s var(--ease-out) infinite;
  }
}

@keyframes ripple {
  from {
    opacity: 0.7;
    transform: scale(0.6);
  }

  to {
    opacity: 0;
    transform: scale(1.25);
  }
}

.mac-changes {
  margin-top: clamp(72px, 9vw, 120px);
}

.mac-changes-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
}

.change-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  list-style: none;
}

.change-card {
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 26px 28px 30px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background: var(--color-bg-raised);
}

.change-card-wide {
  grid-column: span 2;
}

.change-card h4 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 2px;
  font-size: 1.125rem;
  font-weight: 680;
  line-height: 1.4;
}

.change-card h4 .icon {
  width: 22px;
  height: 22px;
  color: var(--color-link);
}

.change-card p,
.change-card li {
  max-width: var(--measure);
  color: var(--color-text-secondary);
  font-size: 1rem;
}

.change-card ul {
  display: grid;
  gap: 6px;
  list-style: none;
}

@media (max-width: 1023px) {
  .how-steps {
    grid-template-columns: minmax(0, 1fr);
    max-width: 560px;
  }

  .change-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 639px) {
  .change-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .change-card-wide {
    grid-column: auto;
  }

  .change-card {
    padding: 24px;
  }
}

/* ==========================================
   开源与参与
   ========================================== */

/* 帆船画稿从左侧淡入底色，像 README 的头图那样 */
.open-source {
  isolation: isolate;
  overflow: clip;
}

.open-source-art {
  position: absolute;
  top: 50%;
  left: 0;
  z-index: -1;
  width: min(54%, 800px);
  aspect-ratio: 1;
  translate: 0 -50%;
  -webkit-mask-image:
    linear-gradient(90deg, #000 35%, transparent 96%),
    linear-gradient(
      180deg,
      transparent 0%,
      #000 22%,
      #000 66%,
      transparent 96%
    );
  mask-image:
    linear-gradient(90deg, #000 35%, transparent 96%),
    linear-gradient(
      180deg,
      transparent 0%,
      #000 22%,
      #000 66%,
      transparent 96%
    );
  -webkit-mask-composite: source-in;
  mask-composite: intersect;
}

.open-source-art img {
  width: 100%;
}

.open-source-inner > * {
  max-width: 780px;
  margin-left: auto;
}

.github-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  list-style: none;
}

.github-card {
  display: grid;
  align-content: start;
  justify-items: start;
  gap: 12px;
  padding: 26px 26px 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background: color-mix(in srgb, var(--color-bg-raised) 86%, transparent);
  box-shadow: var(--shadow-card);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
}

.github-card h3 {
  margin-top: 6px;
  font-size: 1.1875rem;
  font-weight: 680;
  line-height: 1.35;
}

.github-card p {
  color: var(--color-text-secondary);
  font-size: 1rem;
}

.github-card .card-link {
  margin-top: 4px;
}

.github-card-wide {
  grid-column: 1 / -1;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 20px;
}

.github-card-wide h3 {
  margin-top: 0;
}

.github-card-body {
  display: grid;
  gap: 6px;
}

@media (max-width: 1023px) {
  /* 窄屏：画稿移到区块顶部居中，向下淡入底色 */
  .open-source {
    padding-top: calc(min(100vw, 600px) * 0.84);
  }

  .open-source-art {
    top: 0;
    left: 50%;
    width: min(100%, 600px);
    translate: -50% 0;
    -webkit-mask-image:
      linear-gradient(180deg, #000 36%, transparent 86%),
      linear-gradient(
        90deg,
        transparent 0%,
        #000 18%,
        #000 82%,
        transparent 100%
      );
    mask-image:
      linear-gradient(180deg, #000 36%, transparent 86%),
      linear-gradient(
        90deg,
        transparent 0%,
        #000 18%,
        #000 82%,
        transparent 100%
      );
  }

  .open-source-inner > * {
    max-width: none;
  }
}

@media (max-width: 639px) {
  .github-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .github-card-wide {
    grid-template-columns: minmax(0, 1fr);
    justify-items: start;
  }
}

/* ==========================================
   常见问题
   ========================================== */

.faq {
  padding-top: clamp(48px, 6vw, 88px);
}

.faq-inner {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  align-items: start;
  gap: clamp(40px, 6vw, 96px);
}

.faq-header {
  position: sticky;
  top: calc(var(--nav-height) + 40px);
  margin-bottom: 0;
}

.faq-list {
  display: grid;
  gap: 12px;
}

@media (max-width: 899px) {
  .faq-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 40px;
  }

  .faq-header {
    position: static;
  }
}

/* ==========================================
   收尾的下载区
   ========================================== */

.closing {
  padding-top: 0;
}

.closing-card {
  position: relative;
  display: grid;
  justify-items: center;
  gap: 24px;
  padding: clamp(56px, 8vw, 104px) 24px;
  border: 1px solid var(--color-border);
  border-radius: 36px;
  background:
    radial-gradient(
      circle at 50% 0%,
      var(--orb-glow),
      transparent 55%
    ),
    linear-gradient(
      180deg,
      var(--sky-top) 0%,
      var(--sky-middle) 60%,
      var(--color-bg-sunken) 100%
    );
  text-align: center;
  overflow: clip;
}

.closing-icon {
  width: 128px;
  height: 128px;
  filter: drop-shadow(0 18px 28px rgb(22 36 60 / 22%));
}

.closing-title {
  font-size: clamp(2.25rem, 1.4rem + 3.4vw, 4rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.04em;
  text-wrap: balance;
}

.closing-title:lang(zh) {
  font-weight: 760;
  line-height: 1.25;
  letter-spacing: 0.01em;
}

.closing-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.closing .meta-line {
  justify-content: center;
}