/* ============ The Pet Why — 全站样式 ============ */
/* 零外部依赖：系统字体栈 + 原生元素，Core Web Vitals 友好 */

:root {
  --cream: #FAF6F0;
  --cream-2: #F3ECE2;
  --green: #1E4635;
  --green-2: #2E5D47;
  --green-soft: #E4EEE8;
  --orange: #E8873A;
  --orange-2: #D9741F;
  --ink: #26221D;
  --ink-soft: #5C554B;
  --line: #E4DCD0;
  --white: #FFFFFF;
  --radius: 14px;
  --shadow: 0 2px 12px rgba(38, 34, 29, 0.07);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--cream);
  color: var(--ink);
  line-height: 1.65;
  font-size: 16.5px;
}

img { max-width: 100%; display: block; }
a { color: var(--green-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 1100px; margin: 0 auto; padding: 0 22px; }

/* ---------- Header ---------- */
.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 50;
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 22px; max-width: 1100px; margin: 0 auto;
}
.logo {
  font-weight: 800; font-size: 1.28rem; color: var(--green);
  letter-spacing: -0.02em; display: flex; align-items: center; gap: 8px;
}
.logo .paw { color: var(--orange); font-size: 1.15rem; }
.logo:hover { text-decoration: none; }

nav.main-nav { display: flex; gap: 26px; align-items: center; }
nav.main-nav a { color: var(--ink-soft); font-weight: 600; font-size: 0.95rem; }
nav.main-nav a:hover { color: var(--green); text-decoration: none; }

.nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--green); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; padding: 13px 28px; border-radius: 999px;
  font-weight: 700; font-size: 1rem; cursor: pointer; border: none;
  transition: transform 0.12s ease, background 0.12s ease;
  text-align: center;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--orange); color: var(--white); }
.btn-primary:hover { background: var(--orange-2); }
.btn-outline { background: transparent; color: var(--green); border: 2px solid var(--green); }
.btn-outline:hover { background: var(--green); color: var(--white); }
.btn-sm { padding: 9px 20px; font-size: 0.92rem; }

/* ---------- Hero ---------- */
.hero { padding: 64px 0 56px; background: linear-gradient(180deg, var(--cream) 0%, var(--cream-2) 100%); }
.hero .eyebrow {
  display: inline-block; background: var(--green-soft); color: var(--green);
  font-weight: 700; font-size: 0.82rem; padding: 6px 14px; border-radius: 999px;
  margin-bottom: 18px; letter-spacing: 0.04em; text-transform: uppercase;
}
.hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.3rem); line-height: 1.12;
  letter-spacing: -0.03em; color: var(--green); max-width: 760px;
}
.hero h1 em { color: var(--orange); font-style: normal; }
.hero p.lede { font-size: 1.15rem; color: var(--ink-soft); max-width: 640px; margin: 20px 0 30px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- Trust bar ---------- */
.trust-bar { background: var(--green); color: var(--cream); }
.trust-bar .wrap {
  display: flex; gap: 10px; justify-content: space-between; flex-wrap: wrap;
  padding: 13px 22px; font-size: 0.88rem; font-weight: 600;
}
.trust-bar span { display: flex; align-items: center; gap: 7px; }

/* ---------- Sections ---------- */
.section { padding: 60px 0; }
.section-head { max-width: 700px; margin-bottom: 36px; }
.section-head h2 { font-size: clamp(1.6rem, 3.4vw, 2.2rem); color: var(--green); letter-spacing: -0.02em; line-height: 1.2; }
.section-head p { color: var(--ink-soft); margin-top: 10px; }

/* ---------- Cards ---------- */
.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--white); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow);
  display: flex; flex-direction: column;
}
.card h3 { color: var(--green); font-size: 1.12rem; margin-bottom: 8px; letter-spacing: -0.01em; }
.card p { color: var(--ink-soft); font-size: 0.96rem; flex: 1; }
.card .card-link { font-weight: 700; margin-top: 14px; font-size: 0.93rem; }
.card .emoji { font-size: 1.7rem; margin-bottom: 12px; display: block; }

/* ---------- Product cards ---------- */
.product-card { padding: 0; overflow: hidden; }
.product-card .ph {
  background: linear-gradient(135deg, var(--green-soft), var(--cream-2));
  min-height: 170px; display: flex; align-items: center; justify-content: center;
  font-size: 3rem;
}
.product-card .body { padding: 20px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.product-card .price { color: var(--orange-2); font-weight: 800; font-size: 1.15rem; }
.product-card .tagline { color: var(--ink-soft); font-size: 0.92rem; margin-top: 4px; }
.product-card .card-link { margin-top: auto; padding-top: 14px; }

/* ---------- Guide/Article layout ---------- */
.article { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(24px, 4vw, 48px); max-width: 800px; margin: 40px auto; box-shadow: var(--shadow); }
.article h1 { font-size: clamp(1.7rem, 4vw, 2.4rem); color: var(--green); line-height: 1.18; letter-spacing: -0.02em; margin-bottom: 10px; }
.article .meta { color: var(--ink-soft); font-size: 0.88rem; margin-bottom: 8px; }
.article .tldr {
  background: var(--green-soft); border-left: 4px solid var(--green);
  padding: 16px 20px; border-radius: 0 10px 10px 0; margin: 22px 0 8px;
  font-size: 1.02rem;
}
.article .tldr strong { color: var(--green); }
.article h2 { font-size: 1.42rem; color: var(--green); margin: 36px 0 12px; letter-spacing: -0.01em; }
.article h3 { font-size: 1.12rem; color: var(--green-2); margin: 26px 0 8px; }
.article p { margin-bottom: 14px; }
.article ul, .article ol { margin: 0 0 16px 22px; }
.article li { margin-bottom: 8px; }
.article blockquote {
  border-left: 3px solid var(--orange); background: var(--cream);
  padding: 14px 18px; border-radius: 0 8px 8px 0; margin: 18px 0;
  color: var(--ink-soft); font-style: italic;
}
.callout {
  background: var(--cream-2); border: 1px dashed var(--orange);
  border-radius: 12px; padding: 18px 22px; margin: 26px 0;
}
.callout h3 { margin-top: 0; }
.callout .btn { margin-top: 10px; }
.vet-note {
  background: #FDF1E7; border-radius: 10px; padding: 14px 18px;
  font-size: 0.9rem; color: var(--ink-soft); margin: 22px 0;
  border: 1px solid #F3D8BF;
}

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; margin: 18px 0; }
table { border-collapse: collapse; width: 100%; font-size: 0.94rem; background: var(--white); }
th, td { border: 1px solid var(--line); padding: 11px 14px; text-align: left; vertical-align: top; }
th { background: var(--green-soft); color: var(--green); font-weight: 700; }
tr:nth-child(even) td { background: var(--cream); }
.yes { color: var(--green); font-weight: 700; }
.no { color: #B3452E; font-weight: 700; }

/* ---------- FAQ ---------- */
.faq details {
  background: var(--white); border: 1px solid var(--line);
  border-radius: 12px; margin-bottom: 12px; overflow: hidden;
}
.faq summary {
  padding: 16px 20px; font-weight: 700; color: var(--green);
  cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 1.3rem; color: var(--orange); font-weight: 400; }
.faq details[open] summary::after { content: "–"; }
.faq .faq-body { padding: 0 20px 18px; color: var(--ink-soft); border-top: 1px solid var(--line); padding-top: 14px; }

/* ---------- Breadcrumb ---------- */
.crumbs { font-size: 0.85rem; color: var(--ink-soft); padding: 18px 0 0; }
.crumbs a { color: var(--ink-soft); }

/* ---------- Product page ---------- */
.product-hero { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin: 34px 0; align-items: start; }
.ph-main {
  background: linear-gradient(135deg, var(--green-soft), var(--cream-2));
  border-radius: var(--radius); min-height: 380px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px;
  font-size: 4.5rem; border: 1px solid var(--line);
}
.ph-note { font-size: 0.78rem; color: var(--ink-soft); background: var(--cream-2); padding: 6px 12px; border-radius: 8px; }
.product-info h1 { font-size: clamp(1.6rem, 3.5vw, 2.2rem); color: var(--green); line-height: 1.2; letter-spacing: -0.02em; }
.product-info .verdict { color: var(--ink-soft); font-size: 1.02rem; margin: 12px 0 16px; }
.product-info .price-big { font-size: 1.9rem; font-weight: 800; color: var(--ink); }
.product-info .price-note { color: var(--ink-soft); font-size: 0.88rem; }
.buy-actions { display: flex; gap: 12px; margin: 20px 0; flex-wrap: wrap; }
.perks { list-style: none; margin: 14px 0; }
.perks li { display: flex; gap: 10px; align-items: baseline; margin-bottom: 9px; font-size: 0.96rem; }
.perks .tick { color: var(--orange); font-weight: 800; }

/* ---------- Reviews placeholder ---------- */
.reviews-slot {
  border: 2px dashed var(--line); border-radius: var(--radius);
  padding: 34px; text-align: center; color: var(--ink-soft); background: var(--white);
}
.reviews-slot strong { color: var(--green); }

/* ---------- Footer ---------- */
.site-footer { background: var(--green); color: var(--cream); margin-top: 40px; }
.footer-inner { max-width: 1100px; margin: 0 auto; padding: 48px 22px 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 34px; }
.site-footer h4 { color: var(--white); font-size: 0.95rem; margin-bottom: 14px; letter-spacing: 0.03em; text-transform: uppercase; }
.site-footer a { color: var(--cream); opacity: 0.85; font-size: 0.92rem; display: block; margin-bottom: 9px; }
.site-footer a:hover { opacity: 1; }
.site-footer p { font-size: 0.92rem; opacity: 0.85; }
.footer-bottom { border-top: 1px solid rgba(250, 246, 240, 0.2); margin-top: 36px; padding-top: 20px; font-size: 0.82rem; opacity: 0.7; }
.footer-logo { font-weight: 800; font-size: 1.2rem; color: var(--white); margin-bottom: 12px; display: block; }

/* ---------- Newsletter ---------- */
.newsletter { background: var(--cream-2); border-radius: var(--radius); padding: 40px; text-align: center; }
.newsletter h2 { color: var(--green); margin-bottom: 8px; }
.newsletter p { color: var(--ink-soft); margin-bottom: 20px; }
.newsletter form { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.newsletter input {
  padding: 13px 18px; border-radius: 999px; border: 1px solid var(--line);
  min-width: 260px; font-size: 1rem; background: var(--white);
}

/* ---------- 404 ---------- */
.p404 { text-align: center; padding: 100px 22px; }
.p404 h1 { font-size: 5rem; color: var(--green); }
.p404 p { color: var(--ink-soft); margin: 12px 0 26px; }

/* ---------- Responsive ---------- */
@media (max-width: 880px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .product-hero { grid-template-columns: 1fr; }
  .ph-main { min-height: 260px; }
}
@media (max-width: 640px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .nav-toggle { display: block; }
  nav.main-nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--white); border-bottom: 1px solid var(--line);
    flex-direction: column; gap: 0; padding: 8px 0;
  }
  nav.main-nav.open { display: flex; }
  nav.main-nav a { padding: 13px 24px; border-top: 1px solid var(--line); }
  .trust-bar .wrap { justify-content: center; gap: 8px 18px; font-size: 0.8rem; }
  .hero { padding: 44px 0 40px; }
  .section { padding: 44px 0; }
}