/* ============================================================
   AllRich Storefront — single-product DTC landing page
   设计语言:claude.ai —— 暖米白纸感背景 + Claude 珊瑚橘 accent
   + 衬线大标题 + 克制的方圆几何。自包含,无外部依赖。
   浅/深色主题由 [data-theme] 控制。
   ============================================================ */

:root {
  /* —— claude.ai warm paper palette —— */
  --bg: #faf9f5;            /* Claude 暖纸白 */
  --bg-muted: #f0ede4;      /* 段落底色 cream */
  --surface: #ffffff;
  --text: #29261f;          /* 暖近黑 */
  --text-soft: #6f6b61;
  --border: #e7e2d6;
  --accent: #d97757;        /* Claude coral / terracotta */
  --accent-strong: #c15f3c;
  --accent-soft: #f6e7de;   /* coral 淡底(icon 底/标签) */
  --accent-contrast: #ffffff;
  --gold: #c79a4b;          /* 评分星,与暖调协调 */
  --shadow: 0 1px 2px rgba(41,38,31,.04), 0 8px 28px rgba(41,38,31,.06);
  --shadow-sm: 0 1px 2px rgba(41,38,31,.05);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-btn: 10px;       /* claude.ai 按钮是方圆,不是胶囊 */
  --maxw: 1120px;
  --font: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, ui-serif, serif;
}

/* 深色主题:同时支持系统偏好(auto)与手动 data-theme="dark" */
@media (prefers-color-scheme: dark) {
  :root[data-theme="auto"] {
    --bg: #262624;
    --bg-muted: #1f1e1c;
    --surface: #30302d;
    --text: #f4f1e9;
    --text-soft: #a8a496;
    --border: #3c3a34;
    --accent: #e0885f;
    --accent-strong: #eba184;
    --accent-soft: #3a2f28;
    --accent-contrast: #211f1b;
    --gold: #d9b968;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 10px 30px rgba(0,0,0,.35);
    --shadow-sm: 0 1px 2px rgba(0,0,0,.3);
  }
}
:root[data-theme="dark"] {
  --bg: #262624;
  --bg-muted: #1f1e1c;
  --surface: #30302d;
  --text: #f4f1e9;
  --text-soft: #a8a496;
  --border: #3c3a34;
  --accent: #e0885f;
  --accent-strong: #eba184;
  --accent-soft: #3a2f28;
  --accent-contrast: #211f1b;
  --gold: #d9b968;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 10px 30px rgba(0,0,0,.35);
  --shadow-sm: 0 1px 2px rgba(0,0,0,.3);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
h1, h2, h3 { margin: 0 0 .5em; letter-spacing: -.01em; }
/* claude.ai 标志性:大标题用暖衬线 */
h1, h2 { font-family: var(--font-serif); font-weight: 600; line-height: 1.12; letter-spacing: -.015em; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
.container--narrow { max-width: 720px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: .5em; font-weight: 500; font-size: 1rem; font-family: var(--font);
  padding: .72em 1.3em; border-radius: var(--radius-btn); border: 1px solid transparent;
  cursor: pointer; text-decoration: none;
  transition: transform .12s ease, background .18s ease, box-shadow .18s ease, border-color .18s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--accent); color: var(--accent-contrast); box-shadow: var(--shadow-sm); }
.btn--primary:hover { background: var(--accent-strong); }
.btn--ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent-strong); }
.btn--lg { font-size: 1.05rem; padding: .85em 1.6em; }
.btn--sm { font-size: .88rem; padding: .5em 1em; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.nav__right { display: flex; align-items: center; gap: 12px; }
.brand { font-family: var(--font-serif); font-weight: 600; font-size: 1.32rem; letter-spacing: -.02em; color: var(--text); text-decoration: none; }
.theme-toggle {
  background: transparent; border: 1px solid var(--border); color: var(--text);
  width: 38px; height: 38px; border-radius: 999px; cursor: pointer; font-size: 1.1rem; line-height: 1;
  transition: border-color .18s, color .18s;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent-strong); }

/* ---------- Hero ---------- */
.hero { padding: clamp(44px, 7vw, 92px) 0; }
.hero__grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 52px; align-items: center; }
.eyebrow { text-transform: uppercase; letter-spacing: .16em; font-size: .76rem; font-weight: 600; color: var(--accent-strong); margin: 0 0 16px; }
.hero__hook { font-size: clamp(2.1rem, 4.6vw, 3.5rem); font-weight: 600; }
.hero__sub { font-size: 1.14rem; color: var(--text-soft); max-width: 46ch; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin: 28px 0 16px; }
.hero__trust { font-size: .9rem; color: var(--text-soft); margin: 0; }
.hero__media { position: relative; }
.hero__media img { width: 100%; border-radius: var(--radius); box-shadow: var(--shadow); background: var(--bg-muted); }
.hero__price-tag {
  position: absolute; bottom: 16px; left: 16px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 10px 16px; box-shadow: var(--shadow);
  display: flex; align-items: baseline; gap: 10px;
}
.price { font-size: 1.4rem; font-weight: 700; color: var(--text); }
.price--compare { text-decoration: line-through; color: var(--text-soft); font-size: 1rem; }

/* ---------- Sections ---------- */
.section { padding: clamp(52px, 7vw, 92px) 0; }
.section--muted { background: var(--bg-muted); }
.section__title { font-size: clamp(1.7rem, 3vw, 2.4rem); font-weight: 600; text-align: center; }
.section__note { text-align: center; color: var(--text-soft); max-width: 52ch; margin: 0 auto 8px; }

/* ---------- Cards ---------- */
.cards { display: grid; gap: 20px; margin-top: 38px; }
.cards--2 { grid-template-columns: repeat(2, 1fr); }
.cards--3 { grid-template-columns: repeat(3, 1fr); }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow-sm);
  transition: box-shadow .2s ease, transform .12s ease;
}
.card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.card__icon {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent-strong);
  margin-bottom: 16px;
}
.card__icon svg { width: 24px; height: 24px; }
.card h3 { font-family: var(--font); font-weight: 650; font-size: 1.12rem; letter-spacing: -.005em; }
.card p { color: var(--text-soft); margin: 0; }

/* ---------- Social proof ---------- */
.proof__head { text-align: center; }
.proof__rating { display: inline-flex; align-items: center; gap: 8px; color: var(--text-soft); margin-top: 6px; }
.stars { color: var(--gold); letter-spacing: 2px; font-size: 1.1rem; }
.review__top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.review__name { font-weight: 700; }
.review__handle { color: var(--text-soft); font-size: .85rem; }
.review__stars { color: var(--gold); font-size: .95rem; letter-spacing: 1px; }
.review__verified { font-size: .72rem; color: var(--accent-strong); font-weight: 700; margin-top: 10px; }
.press { list-style: none; display: flex; flex-wrap: wrap; gap: 10px 22px; justify-content: center; padding: 0; margin: 36px 0 0; color: var(--text-soft); font-size: .82rem; text-transform: uppercase; letter-spacing: .1em; }
.press li { position: relative; }

/* ---------- Bundles ---------- */
.bundles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 38px 0 14px; }
.bundle {
  position: relative; background: var(--surface); border: 1.5px solid var(--border);
  border-radius: var(--radius); padding: 30px 24px; text-align: center;
  display: flex; flex-direction: column; gap: 10px; transition: border-color .2s, transform .12s, box-shadow .2s;
}
.bundle:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.bundle--featured { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.bundle__tag {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: var(--accent); color: var(--accent-contrast);
  font-size: .72rem; font-weight: 600; letter-spacing: .05em; text-transform: uppercase;
  padding: 5px 14px; border-radius: 999px; white-space: nowrap;
}
.bundle__label { font-weight: 700; font-size: 1.22rem; }
.bundle__price { font-family: var(--font-serif); font-size: 2rem; font-weight: 600; }
.bundle__per { color: var(--text-soft); font-size: .85rem; }
.urgency { text-align: center; color: var(--accent-strong); font-weight: 600; margin: 8px 0 0; }

/* ---------- FAQ ---------- */
.faq { margin-top: 32px; }
.faq__item { border-bottom: 1px solid var(--border); }
.faq__q {
  width: 100%; text-align: left; background: none; border: 0; cursor: pointer;
  font-size: 1.08rem; font-weight: 600; color: var(--text); font-family: var(--font);
  padding: 20px 0; display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
.faq__q::after { content: "+"; font-size: 1.4rem; color: var(--accent-strong); transition: transform .2s; }
.faq__item[open] .faq__q::after { transform: rotate(45deg); }
.faq__a { padding: 0 0 20px; color: var(--text-soft); margin: 0; max-width: 62ch; }

/* ---------- Capture ---------- */
.capture { background: var(--bg-muted); }
.capture__inner { text-align: center; }
.capture__form { display: flex; gap: 10px; max-width: 460px; margin: 26px auto 10px; }
.capture__form input {
  flex: 1; padding: .82em 1.1em; border-radius: var(--radius-btn); border: 1px solid var(--border);
  background: var(--surface); color: var(--text); font-size: 1rem; font-family: var(--font);
}
.capture__form input:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
.capture__msg { min-height: 1.2em; font-weight: 600; color: var(--accent-strong); margin: 4px 0; }
.capture__fine { color: var(--text-soft); font-size: .82rem; margin: 0; }

/* ---------- Final ---------- */
.final__inner { text-align: center; }
.final__title { font-family: var(--font-serif); font-size: clamp(1.8rem, 3.2vw, 2.6rem); font-weight: 600; }
.final__sub { color: var(--text-soft); margin-bottom: 26px; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); padding: 32px 0; background: var(--bg-muted); }
.footer__inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px; }
.footer__links { display: flex; gap: 18px; flex-wrap: wrap; }
.footer__links a { color: var(--text-soft); text-decoration: none; font-size: .9rem; }
.footer__links a:hover { color: var(--accent-strong); }
.footer__copy { color: var(--text-soft); font-size: .85rem; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .hero__grid { grid-template-columns: 1fr; gap: 32px; }
  .hero__media { order: -1; }
  .cards--2, .cards--3, .bundles { grid-template-columns: 1fr; }
}
@media (min-width: 861px) and (max-width: 1000px) {
  .cards--3 { grid-template-columns: repeat(2, 1fr); }
}

/* 隐藏未初始化时的空态,避免闪烁 */
[data-bind]:empty { min-height: 0; }