/* ==========================================================================
   AI Puppy Go — 全站共享样式 v2
   ========================================================================== */

:root {
  --color-bg: #FBFAFF;
  --color-bg-soft: #F1EEFC;
  --color-bg-soft-2: #FFF1EC;
  --color-surface: #FFFFFF;
  --color-ink: #14121F;
  --color-body: #57546E;
  --color-primary: #4B36F0;
  --color-primary-dark: #211854;
  --color-primary-soft: #ECE8FE;
  --color-accent: #FF6A45;
  --color-accent-dark: #E14F2B;
  --color-accent-soft: #FFE6DC;
  --color-line: #E8E5F5;
  --color-line-strong: #D6D1EF;

  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 9px;

  --shadow-xs: 0 1px 2px rgba(20, 18, 31, 0.04);
  --shadow-card: 0 2px 8px rgba(20, 18, 31, 0.05), 0 1px 2px rgba(20, 18, 31, 0.04);
  --shadow-hover: 0 18px 40px -12px rgba(75, 54, 240, 0.28);
  --shadow-soft: 0 24px 60px -20px rgba(75, 54, 240, 0.22);

  --max-width: 1160px;
  --font-heading: 'Space Grotesk', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-body);
  background: var(--color-bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 0 0 0.55em;
  color: var(--color-ink);
}

p { margin: 0 0 1.1em; color: var(--color-body); }
strong { color: var(--color-ink); font-weight: 600; }

a { color: var(--color-primary); text-decoration: none; transition: color 0.15s ease; }
a:hover { color: var(--color-accent); }

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(251, 250, 255, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-line);
}

.nav-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
  color: var(--color-ink);
}

.brand .paw {
  font-size: 1.2rem;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: var(--color-primary-soft);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--color-body);
  font-weight: 500;
  font-size: 0.92rem;
  padding: 8px 14px;
  border-radius: 999px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-ink);
  background: var(--color-primary-soft);
}

.nav-cta {
  background: var(--color-ink) !important;
  color: #fff !important;
  padding: 9px 18px !important;
  border-radius: 999px;
  font-weight: 600 !important;
  margin-left: 6px;
  white-space: nowrap;
}
.nav-cta:hover { background: var(--color-primary) !important; }

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

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 88px 0 72px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 620px;
  background:
    radial-gradient(560px 320px at 12% 20%, rgba(75, 54, 240, 0.14), transparent 60%),
    radial-gradient(480px 320px at 85% 10%, rgba(255, 106, 69, 0.14), transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 56px;
  flex-wrap: wrap;
}

.hero-copy { flex: 1 1 480px; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  padding: 7px 14px;
  border-radius: 999px;
  margin-bottom: 22px;
}

.hero h1 {
  font-size: clamp(2.1rem, 4.4vw, 3.4rem);
  margin-bottom: 0.35em;
}

.hero .lead {
  font-size: 1.14rem;
  color: var(--color-body);
  max-width: 46ch;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 30px;
  flex-wrap: wrap;
}

.hero-visual {
  flex: 1 1 380px;
  display: flex;
  justify-content: center;
}

/* ---------- dashboard mock card in hero ---------- */
.mock-panel {
  position: relative;
  width: 100%;
  max-width: 420px;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xl);
  padding: 22px;
  box-shadow: var(--shadow-soft);
  transform: rotate(1.2deg);
}

.mock-panel-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
}
.mock-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--color-line-strong); }
.mock-dot:nth-child(1) { background: #FF6A45; }
.mock-dot:nth-child(2) { background: #FFC24B; }
.mock-dot:nth-child(3) { background: #35C77E; }

.mock-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.mock-stat {
  background: var(--color-bg-soft);
  border-radius: var(--radius-md);
  padding: 16px;
}
.mock-stat .mock-icon {
  width: 32px; height: 32px;
  border-radius: 9px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  background: #fff;
  margin-bottom: 10px;
  box-shadow: var(--shadow-xs);
}
.mock-stat .mock-num {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--color-ink);
  line-height: 1.2;
}
.mock-stat .mock-label {
  font-size: 0.76rem;
  color: var(--color-body);
  margin-top: 2px;
}
.mock-stat.accent .mock-num { color: var(--color-accent-dark); }

.mock-float {
  position: absolute;
  background: var(--color-ink);
  color: #fff;
  border-radius: var(--radius-md);
  padding: 10px 14px;
  font-size: 0.78rem;
  font-weight: 600;
  box-shadow: var(--shadow-hover);
  display: flex;
  align-items: center;
  gap: 8px;
}
.mock-float.top { top: -18px; right: -10px; transform: rotate(-3deg); }
.mock-float.bottom { bottom: -16px; left: -18px; transform: rotate(2deg); background: var(--color-accent); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.96rem;
  border: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  font-family: var(--font-body);
}

.btn-primary {
  background: var(--color-ink);
  color: #fff;
  box-shadow: var(--shadow-xs);
}
.btn-primary:hover { background: var(--color-primary); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-hover); }

.btn-accent {
  background: var(--color-accent);
  color: #fff;
}
.btn-accent:hover { background: var(--color-accent-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 16px 32px -12px rgba(255, 106, 69, 0.45); }

.btn-outline {
  background: transparent;
  color: var(--color-ink);
  border: 1.5px solid var(--color-line-strong);
}
.btn-outline:hover { background: var(--color-primary-soft); border-color: var(--color-primary-soft); color: var(--color-primary); }

.btn-block { width: 100%; justify-content: center; }

/* ---------- Sections ---------- */
section { padding: 72px 0; }

.section-head {
  max-width: 620px;
  margin: 0 auto 48px;
  text-align: center;
}

.section-head h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); }
.section-head p { font-size: 1.02rem; }

.alt-bg { background: var(--color-bg-soft); }

/* ---------- Icon badges (feature icons / article thumbs) ---------- */
.feature-icon,
.icon-badge {
  width: 48px;
  height: 48px;
  border-radius: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  background: var(--color-primary-soft);
  margin-bottom: 18px;
}

.feature-grid .feature-card:nth-child(3n+2) .feature-icon { background: var(--color-accent-soft); }
.feature-grid .feature-card:nth-child(3n+3) .feature-icon { background: var(--color-bg-soft); }

/* ---------- Feature grid ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 22px;
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  box-shadow: var(--shadow-card);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}

.feature-card h3 { font-size: 1.08rem; margin-bottom: 0.5em; }
.feature-card p { margin: 0; font-size: 0.95rem; }

/* ---------- Article cards ---------- */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 26px;
}

.article-card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.article-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }

.article-thumb {
  position: relative;
  height: 128px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  background:
    radial-gradient(120% 140% at 15% 0%, rgba(75, 54, 240, 0.18), transparent 60%),
    radial-gradient(120% 140% at 100% 100%, rgba(255, 106, 69, 0.16), transparent 55%),
    var(--color-bg-soft);
}

.article-thumb::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
  z-index: -1;
}

.article-body { padding: 22px 24px 26px; flex: 1; display: flex; flex-direction: column; }

.tag {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  padding: 5px 11px;
  border-radius: 999px;
  margin-bottom: 12px;
  align-self: flex-start;
}

.article-body h3 { font-size: 1.06rem; margin-bottom: 8px; }
.article-body p { font-size: 0.92rem; flex: 1; }

.read-more {
  font-weight: 600;
  font-size: 0.88rem;
  margin-top: 14px;
  color: var(--color-ink);
}
.article-card:hover .read-more { color: var(--color-accent); }

.meta-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--color-body);
  margin-top: 14px;
}

/* ---------- CTA banner ---------- */
.cta-banner {
  position: relative;
  background: var(--color-ink);
  border-radius: var(--radius-xl);
  padding: 52px 44px;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  overflow: hidden;
}

.cta-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(420px 220px at 90% 0%, rgba(75, 54, 240, 0.55), transparent 60%),
    radial-gradient(360px 220px at 5% 100%, rgba(255, 106, 69, 0.35), transparent 60%);
}

.cta-banner > div, .cta-banner > a { position: relative; z-index: 1; }
.cta-banner h2, .cta-banner p { color: #fff; }
.cta-banner p { opacity: 0.82; margin-bottom: 0; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-line);
  padding: 48px 0 30px;
  background: var(--color-surface);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-brand { max-width: 320px; }
.footer-links { display: flex; gap: 48px; flex-wrap: wrap; }
.footer-links h4 { font-size: 0.85rem; margin-bottom: 14px; color: var(--color-ink); text-transform: uppercase; letter-spacing: 0.04em; }
.footer-links ul { list-style: none; margin: 0; padding: 0; }
.footer-links li { margin-bottom: 10px; font-size: 0.9rem; }
.footer-links a { color: var(--color-body); }
.footer-links a:hover { color: var(--color-primary); }

.footer-bottom {
  margin-top: 36px;
  padding-top: 22px;
  border-top: 1px solid var(--color-line);
  font-size: 0.82rem;
  color: var(--color-body);
  text-align: center;
}

/* ---------- Article detail page ---------- */
.article-header {
  padding: 60px 0 36px;
  text-align: center;
  position: relative;
}

.article-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(560px 280px at 50% 0%, rgba(75, 54, 240, 0.10), transparent 65%);
  z-index: -1;
}

.article-header .tag { align-self: center; }
.article-header h1 { max-width: 760px; margin: 0.3em auto; font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
.article-meta { color: var(--color-body); font-size: 0.9rem; }

.article-content {
  max-width: 700px;
  margin: 0 auto;
  padding: 8px 28px 64px;
  font-size: 1.02rem;
}

.article-content h2 {
  font-size: 1.4rem;
  margin-top: 1.7em;
}
.article-content h3 { font-size: 1.15rem; margin-top: 1.4em; }
.article-content ul, .article-content ol { color: var(--color-body); padding-left: 1.3em; }
.article-content li { margin-bottom: 0.6em; }
.article-content blockquote {
  border-left: 3px solid var(--color-accent);
  margin: 1.8em 0;
  padding: 6px 22px;
  background: var(--color-bg-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--color-ink);
  font-style: normal;
  font-weight: 500;
}

.back-link {
  display: inline-flex;
  align-items: center;
  margin: 24px 0 0;
  font-weight: 600;
  color: var(--color-ink);
}
.back-link:hover { color: var(--color-primary); }

.article-nav-footer {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 28px 56px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- Interview tool ---------- */
.tool-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 36px;
  align-items: flex-start;
}

@media (max-width: 860px) {
  .tool-layout { grid-template-columns: 1fr; }
}

.tool-card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: var(--shadow-card);
  position: sticky;
  top: 96px;
}

@media (max-width: 860px) { .tool-card { position: static; } }

.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 8px;
  color: var(--color-ink);
}
.form-group .hint { font-size: 0.8rem; color: var(--color-body); margin-top: 6px; }

.form-group input[type="text"],
.form-group textarea {
  width: 100%;
  padding: 13px 15px;
  border: 1.5px solid var(--color-line);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-ink);
  background: var(--color-bg);
  resize: vertical;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.form-group input[type="text"]:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  background: #fff;
}

.form-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 26px; }

.result-card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xl);
  padding: 34px;
  min-height: 320px;
  box-shadow: var(--shadow-card);
}

.result-placeholder {
  text-align: center;
  color: var(--color-body);
  padding: 56px 10px;
}

.result-placeholder .big-emoji {
  width: 64px; height: 64px;
  border-radius: 18px;
  background: var(--color-primary-soft);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem;
  margin: 0 auto 18px;
}

.q-category {
  margin-bottom: 28px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--color-line);
}
.q-category:last-child { margin-bottom: 0; border-bottom: none; padding-bottom: 0; }
.q-category h4 {
  font-size: 0.92rem;
  color: var(--color-primary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 700;
}
.q-category ol {
  margin: 0;
  padding-left: 1.4em;
}
.q-category li { margin-bottom: 11px; color: var(--color-ink); font-size: 0.96rem; }

.result-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 22px;
  flex-wrap: wrap;
  gap: 10px;
}

.chip-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.chip {
  background: var(--color-bg-soft);
  color: var(--color-primary);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 999px;
}

.copy-toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--color-ink);
  color: #fff;
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 0.9rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 200;
}
.copy-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- About page ---------- */
.about-content { max-width: 700px; margin: 0 auto; padding: 8px 28px 64px; font-size: 1.02rem; }
.contact-box {
  background: var(--color-bg-soft);
  border-radius: var(--radius-lg);
  padding: 26px 28px;
  margin-top: 28px;
}

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-wrap.open .nav-links {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 20px 20px;
    border-bottom: 1px solid var(--color-line);
    gap: 4px;
    box-shadow: var(--shadow-card);
  }
  .nav-wrap.open .nav-links a { padding: 12px 14px; }
  .cta-banner { flex-direction: column; text-align: center; }
  .mock-panel { transform: none; }
}