/* R04 AI口播视频包装站 · style.css — 动画时间轴 ★R66标准 */
:root {
  --color-primary: #2563EB;
  --color-primary-hover: #1D4ED8;
  --color-accent: #F97316;
  --color-bg: #F8FAFC;
  --color-surface: #FFFFFF;
  --color-text: #0F172A;
  --color-text-muted: #64748B;
  --color-border: #E2E8F0;
  --color-hero-overlay: rgba(15, 23, 42, 0.55);
  --footer-h: 88px;
  --header-h: 52px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  font-family: "PingFang SC", "Helvetica Neue", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  padding-bottom: calc(var(--footer-h) + var(--safe-bottom) + 16px);
}
img { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; }
.hidden { display: none !important; }
.muted { color: var(--color-text-muted); font-size: 0.9rem; }

/* ── Hero 动画组 ── */
@keyframes heroFadeIn {
  from { opacity: 0; transform: scale(1.03); }
  to { opacity: 1; transform: scale(1); }
}
@keyframes heroTitleSlide {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes heroCtaPop {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}
.anim-hero-fade { animation: heroFadeIn 600ms cubic-bezier(0.22,1,0.36,1) both; }
.anim-hero-title { animation: heroTitleSlide 800ms ease-out 200ms both; }
.anim-hero-cta { animation: heroCtaPop 500ms cubic-bezier(0.34,1.56,0.64,1) 600ms both; }

/* ── Upload 动画组 ── */
@keyframes uploadPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(37,99,235,0.15); border-color: var(--color-border); }
  50% { box-shadow: 0 0 0 8px rgba(37,99,235,0.08); border-color: var(--color-primary); }
}
@keyframes successCheck {
  from { opacity: 0; transform: scale(0.5); }
  to { opacity: 1; transform: scale(1); }
}
.anim-upload-pulse { animation: uploadPulse 1200ms ease-in-out infinite; }
.upload-zone--done { animation: successCheck 350ms ease-out; border-color: #10B981 !important; }

/* ── Template 动画组 ── */
@keyframes templateEnter {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.anim-template-enter { animation: templateEnter 500ms cubic-bezier(0.22,1,0.36,1) both; }
.template-card { transition: transform 250ms ease-out, box-shadow 250ms ease-out, outline 300ms ease-out; }
.template-card:hover { transform: translateY(-4px); box-shadow: 0 12px 28px rgba(15,23,42,0.12); }
.template-card--selected { outline: 3px solid var(--color-primary); outline-offset: 2px; }

/* ── Export 动画组 ── */
@keyframes exportIn {
  from { opacity: 0; transform: translateY(20px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes exportSpin {
  to { transform: rotate(360deg); }
}
@keyframes confettiFall {
  from { opacity: 1; transform: translateY(0) rotate(0deg); }
  to { opacity: 0; transform: translateY(80vh) rotate(720deg); }
}
.anim-export-in { animation: exportIn 350ms ease-out both; }
.anim-export-spin { animation: exportSpin 800ms linear infinite; }
.anim-export-confetti {
  position: fixed; top: -10px; width: 8px; height: 14px; border-radius: 2px;
  animation: confettiFall 1200ms ease-out forwards; pointer-events: none; z-index: 9999;
}

/* ── Counter 动画组 ── */
@keyframes counterLabelFade {
  from { opacity: 0; }
  to { opacity: 1; }
}
.anim-counter .stat-card__label { animation: counterLabelFade 400ms ease-out 300ms both; }

/* ── Layout ── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  height: var(--header-h); padding: 0 16px;
  background: rgba(255,255,255,0.92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.site-header__logo { font-weight: 700; color: var(--color-text); text-decoration: none; }
.site-header__actions { display: flex; gap: 8px; }

.page-main { max-width: 960px; margin: 0 auto; padding: 0 16px; }
.section { padding: 28px 0; border-bottom: 1px solid var(--color-border); }
.section-head h2 { margin: 0 0 4px; font-size: 1.25rem; }
.section-head p { margin: 0 0 16px; color: var(--color-text-muted); font-size: 0.9rem; }

/* Hero */
.hero { position: relative; min-height: 320px; border-radius: 16px; overflow: hidden; margin-top: 16px; }
.hero__media { position: absolute; inset: 0; background: linear-gradient(135deg, #1e3a8a, #2563EB); }
.hero__video { width: 100%; height: 100%; object-fit: cover; opacity: 0.35; }
.hero__overlay { position: absolute; inset: 0; background: var(--color-hero-overlay); }
.hero__content {
  position: relative; z-index: 1; padding: 48px 24px; color: #fff; text-align: center;
}
.hero__eyebrow { font-size: 0.85rem; opacity: 0.85; margin: 0 0 8px; }
.hero__title { font-size: 1.75rem; margin: 0 0 8px; }
.hero__tagline { margin: 0 0 20px; opacity: 0.9; }
.hero__actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* Stats */
.stats-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
@media (min-width: 640px) { .stats-grid { grid-template-columns: repeat(4, 1fr); } }
.stat-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: 12px; padding: 16px; text-align: center;
}
.stat-card__num { display: block; font-size: 1.5rem; font-weight: 700; color: var(--color-primary); }
.stat-card__label { font-size: 0.8rem; color: var(--color-text-muted); }

/* Upload */
.upload-zone {
  border: 2px dashed var(--color-border); border-radius: 16px;
  padding: 32px 16px; text-align: center; cursor: pointer;
  background: var(--color-surface); transition: border-color 0.2s;
}
.upload-zone.dragover { border-color: var(--color-primary); background: rgba(37,99,235,0.04); }
.upload-zone__icon { font-size: 2rem; margin-bottom: 8px; }
.upload-zone__title { margin: 0 0 4px; font-weight: 600; }
.upload-zone__hint { margin: 0; font-size: 0.85rem; color: var(--color-text-muted); }
.upload-progress { margin-top: 16px; height: 6px; background: var(--color-border); border-radius: 3px; overflow: hidden; }
.upload-progress__bar { height: 100%; width: 0; background: var(--color-primary); transition: width 400ms linear; }

.field { display: block; margin-top: 16px; }
.field span { display: block; font-size: 0.85rem; margin-bottom: 6px; color: var(--color-text-muted); }
.field input, .field textarea, .field select {
  width: 100%; padding: 10px 12px; border: 1px solid var(--color-border);
  border-radius: 10px; background: var(--color-surface);
}

/* Templates */
.chip-row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.chip {
  border: 1px solid var(--color-border); background: var(--color-surface);
  border-radius: 999px; padding: 8px 14px; cursor: pointer; font-size: 0.85rem;
}
.chip--active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.template-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
@media (min-width: 640px) { .template-grid { grid-template-columns: repeat(4, 1fr); } }
.template-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: 12px; overflow: hidden; cursor: pointer;
}
.template-card__cover { aspect-ratio: 9/16; background: #e2e8f0; }
.template-card__cover img { width: 100%; height: 100%; object-fit: cover; }
.template-card__body { padding: 10px; }
.template-card__body h3 { margin: 0 0 4px; font-size: 0.95rem; }
.template-card__body p { margin: 0; font-size: 0.8rem; color: var(--color-text-muted); }
.template-card__tags { display: flex; gap: 4px; flex-wrap: wrap; margin-top: 6px; }
.template-card__tags span {
  font-size: 0.7rem; padding: 2px 6px; border-radius: 4px;
  background: rgba(37,99,235,0.1); color: var(--color-primary);
}

/* Player */
.player-stage { background: var(--color-surface); border-radius: 16px; padding: 16px; border: 1px solid var(--color-border); }
.player-frame { position: relative; aspect-ratio: 9/16; max-width: 280px; margin: 0 auto; background: #000; border-radius: 12px; overflow: hidden; }
.player-video { width: 100%; height: 100%; object-fit: cover; }
.player-subtitle-layer, .player-watermark { position: absolute; inset: 0; pointer-events: none; }
.subtitle-text {
  position: absolute; left: 8px; right: 8px; bottom: 16%;
  text-align: center; padding: 8px 12px; border-radius: 8px; margin: 0;
}
.watermark-text { position: absolute; font-size: 12px; color: #fff; opacity: 0.75; padding: 4px 8px; }
.watermark-text--bottom-right { right: 8px; bottom: 8px; }
.player-toolbar { display: flex; align-items: center; gap: 12px; margin-top: 12px; justify-content: center; }
.player-meta { font-size: 0.85rem; color: var(--color-text-muted); }

/* Editor */
.editor-grid { display: grid; gap: 16px; }
@media (min-width: 768px) { .editor-grid { grid-template-columns: repeat(3, 1fr); } }
.editor-panel {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: 12px; padding: 16px;
}
.editor-panel h3 { margin: 0 0 8px; font-size: 1rem; }
.editor-actions { display: flex; gap: 8px; margin-top: 12px; }
.editor-export-bar { margin-top: 20px; text-align: center; }

.avatar-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 12px; }
.avatar-card {
  border: 1px solid var(--color-border); border-radius: 10px; padding: 8px;
  background: var(--color-bg); cursor: pointer; text-align: center;
}
.avatar-card img { width: 48px; height: 48px; border-radius: 50%; margin: 0 auto 6px; }
.avatar-card strong { display: block; font-size: 0.85rem; }
.avatar-card small { color: var(--color-text-muted); font-size: 0.75rem; }
.avatar-card--active { border-color: var(--color-primary); box-shadow: 0 0 0 2px rgba(37,99,235,0.2); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  border: none; border-radius: 10px; padding: 10px 18px; cursor: pointer;
  font-weight: 600; text-decoration: none; transition: transform 0.15s, opacity 0.15s;
}
.btn:active { transform: scale(0.98); }
.btn--primary { background: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-primary-hover); }
.btn--ghost { background: transparent; color: var(--color-text); border: 1px solid var(--color-border); }
.btn--sm { padding: 6px 12px; font-size: 0.85rem; }
.btn--lg { padding: 14px 28px; font-size: 1rem; }
.btn--full { width: 100%; }

/* Modal */
.modal { position: fixed; inset: 0; z-index: 1000; display: flex; align-items: flex-end; justify-content: center; }
.modal.hidden { display: none; }
.modal__backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.45); }
.modal__sheet {
  position: relative; width: 100%; max-width: 420px; background: var(--color-surface);
  border-radius: 16px 16px 0 0; padding: 24px 20px calc(20px + var(--safe-bottom));
}
.modal__actions { display: flex; flex-direction: column; gap: 8px; margin-top: 16px; }
.export-spinner {
  width: 36px; height: 36px; border: 3px solid var(--color-border);
  border-top-color: var(--color-primary); border-radius: 50%; margin: 0 auto 12px;
}

/* Toast */
.toast {
  position: fixed; left: 50%; bottom: calc(var(--footer-h) + 24px);
  transform: translateX(-50%); z-index: 2000;
  padding: 10px 18px; border-radius: 10px; background: #0f172a; color: #fff;
  font-size: 0.9rem; box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}
.toast--success { background: #059669; }
.toast--error { background: #dc2626; }

/* Footer */
.contact-footer {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 90;
  background: #fff; border-top: 1px solid var(--color-border);
  padding: 10px 12px calc(10px + var(--safe-bottom));
}
.contact-footer__btns { display: flex; gap: 8px; }
.contact-footer__cta {
  flex: 1; text-align: center; padding: 10px; border-radius: 10px;
  background: #c41e1e; color: #fff !important; font-weight: 600; text-decoration: none;
}
.contact-footer__btn {
  flex: 1; text-align: center; padding: 10px; border-radius: 10px;
  border: 1px solid var(--color-border); background: var(--color-surface);
  color: var(--color-text); text-decoration: none; cursor: pointer;
}
.contact-footer__brand { margin: 8px 0 0; font-size: 0.7rem; color: var(--color-text-muted); text-align: center; }

/* Preview page */
.preview-page { padding-bottom: 24px; }
.preview-main { max-width: 420px; margin: 40px auto; padding: 0 16px; }
.preview-card {
  background: var(--color-surface); border-radius: 16px; padding: 28px 20px;
  border: 1px solid var(--color-border); text-align: center;
}
.preview-card__ratio {
  display: inline-block; padding: 4px 10px; border-radius: 6px;
  background: rgba(37,99,235,0.1); color: var(--color-primary); font-size: 0.8rem; margin-bottom: 12px;
}
.preview-meta { text-align: left; padding-left: 20px; color: var(--color-text-muted); font-size: 0.9rem; }

[data-theme="dark"] .site-header { background: rgba(30,41,59,0.95); }
[data-theme="dark"] .contact-footer { background: var(--color-surface); }