/* shzyjdzl.com P0 base CSS, design tokens: deep blue #1a4d8f + warm orange #ff6b35 */

:root {
  --color-primary: #1a4d8f;
  --color-primary-dark: #133866;
  --color-primary-light: #2563ad;
  --color-accent: #ff6b35;
  --color-accent-dark: #e8551e;
  --color-accent-light: #ff8a5e;
  --color-text: #1f2937;
  --color-text-muted: #6b7280;
  --color-bg: #ffffff;
  --color-bg-soft: #f7f9fc;
  --color-border: #e5e7eb;
  --color-success: #16a34a;
  --color-warning: #f59e0b;
  --color-danger: #dc2626;
  --fs-xs: 1.2rem; --fs-sm: 1.4rem; --fs-base: 1.6rem; --fs-lg: 1.8rem; --fs-xl: 2rem; --fs-2xl: 2.4rem; --fs-3xl: 3rem; --fs-4xl: 3.6rem;
  --sp-1: 0.4rem; --sp-2: 0.8rem; --sp-3: 1.2rem; --sp-4: 1.6rem; --sp-5: 2.4rem; --sp-6: 3.2rem; --sp-8: 4.8rem; --sp-10: 6.4rem;
  --radius-sm: 0.4rem; --radius-md: 0.8rem; --radius-lg: 1.2rem; --radius-pill: 999rem;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --container-max: 1200px;
  --container-pad: 1.6rem;
  --font-sans: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
}

html { font-size: 62.5%; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body { font-family: var(--font-sans); font-size: var(--fs-base); line-height: 1.6; color: var(--color-text); background: var(--color-bg); min-height: 100vh; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
img, picture, svg, video { display: block; max-width: 100%; height: auto; }
a { color: var(--color-primary); text-decoration: none; transition: color .2s; }
a:hover, a:focus { color: var(--color-accent); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }

.container { width: 100%; max-width: var(--container-max); margin: 0 auto; padding: 0 var(--container-pad); }
.section { padding: var(--sp-6) 0; }
@media (min-width: 768px) { .section { padding: var(--sp-8) 0; } }

.section-title { font-size: var(--fs-2xl); color: var(--color-primary); text-align: center; margin-bottom: var(--sp-5); font-weight: 700; }
@media (min-width: 768px) { .section-title { font-size: var(--fs-3xl); } }
.section-subtitle { text-align: center; color: var(--color-text-muted); margin-bottom: var(--sp-6); font-size: var(--fs-base); }

.btn { display: inline-block; padding: var(--sp-2) var(--sp-4); border-radius: var(--radius-md); font-size: var(--fs-base); font-weight: 600; text-align: center; transition: all .2s ease; white-space: nowrap; }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover, .btn-primary:focus { background: var(--color-primary-dark); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-accent { background: var(--color-accent); color: #fff; }
.btn-accent:hover, .btn-accent:focus { background: var(--color-accent-dark); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline { background: transparent; color: var(--color-primary); border: 2px solid var(--color-primary); }
.btn-outline:hover { background: var(--color-primary); color: #fff; }
.btn-outline.is-active { background: var(--color-primary); color: #fff; }

.text-accent { color: var(--color-accent); }
.text-primary { color: var(--color-primary); }
.text-center { text-align: center; }
.mt-2 { margin-top: var(--sp-2); }
.mt-4 { margin-top: var(--sp-4); }
.mt-6 { margin-top: var(--sp-6); }

/* Header */
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255, 255, 255, 0.97); backdrop-filter: saturate(180%) blur(10px); border-bottom: 1px solid var(--color-border); box-shadow: var(--shadow-sm); }
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 6rem; position: relative; }
.site-logo { display: flex; align-items: center; gap: var(--sp-2); font-size: var(--fs-lg); font-weight: 700; color: var(--color-primary); }
.site-logo img { width: 3.6rem; height: 3.6rem; }
.nav-toggle { display: flex; align-items: center; justify-content: center; width: 4rem; height: 4rem; font-size: var(--fs-2xl); color: var(--color-primary); }
.nav-list { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; background: #fff; border-bottom: 1px solid var(--color-border); padding: var(--sp-2) 0; }
.nav-list.is-open { display: flex; }
.nav-link { display: block; padding: var(--sp-3) var(--container-pad); font-size: var(--fs-base); color: var(--color-text); border-left: 3px solid transparent; }
.nav-link:hover, .nav-link.is-active { color: var(--color-primary); background: var(--color-bg-soft); border-left-color: var(--color-accent); }
.nav-cta { display: none; }

@media (min-width: 992px) {
  .nav-toggle { display: none; }
  .nav-list { display: flex !important; position: static; flex-direction: row; background: transparent; border: none; padding: 0; align-items: center; }
  .nav-link { padding: var(--sp-2) var(--sp-3); border-left: none; border-bottom: 3px solid transparent; }
  .nav-link:hover, .nav-link.is-active { border-bottom-color: var(--color-accent); background: transparent; }
  .nav-cta { display: inline-block; }
}

/* Hero */
.hero { position: relative; background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%); color: #fff; padding: var(--sp-8) 0; text-align: center; overflow: hidden; }
.hero::before { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at top right, rgba(255, 107, 53, 0.18), transparent 60%); pointer-events: none; }
.hero-title { font-size: var(--fs-2xl); font-weight: 700; margin-bottom: var(--sp-3); position: relative; }
.hero-subtitle { font-size: var(--fs-base); opacity: 0.92; margin-bottom: var(--sp-5); position: relative; }
.hero-cta { position: relative; }
@media (min-width: 768px) { .hero { padding: var(--sp-10) 0; } .hero-title { font-size: var(--fs-4xl); } .hero-subtitle { font-size: var(--fs-lg); } }

/* Card grid */
.card-grid { display: grid; gap: var(--sp-4); grid-template-columns: 1fr; }
@media (min-width: 600px) { .card-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 992px) { .card-grid { grid-template-columns: repeat(3, 1fr); } }
.card { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--sp-5); transition: transform .2s, box-shadow .2s, border-color .2s; }
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--color-primary-light); }
.card-icon { font-size: 3.6rem; color: var(--color-accent); margin-bottom: var(--sp-3); }
.card-title { font-size: var(--fs-lg); color: var(--color-primary); margin-bottom: var(--sp-2); font-weight: 600; }
.card-text { color: var(--color-text-muted); font-size: var(--fs-sm); }

/* Form */
.form-grid { display: grid; gap: var(--sp-3); grid-template-columns: 1fr; }
@media (min-width: 600px) { .form-grid { grid-template-columns: repeat(2, 1fr); } }
.form-grid .form-full { grid-column: 1 / -1; }
.form-field { display: flex; flex-direction: column; }
.form-label { font-size: var(--fs-sm); color: var(--color-text); margin-bottom: var(--sp-1); font-weight: 500; }
.form-label .req { color: var(--color-danger); }
.form-input, .form-textarea, .form-select { width: 100%; padding: var(--sp-3); border: 1px solid var(--color-border); border-radius: var(--radius-md); font-family: inherit; font-size: var(--fs-base); background: #fff; transition: border-color .2s, box-shadow .2s; }
.form-input:focus, .form-textarea:focus, .form-select:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(26, 77, 143, 0.12); }
.form-textarea { min-height: 12rem; resize: vertical; }
.form-help { font-size: var(--fs-xs); color: var(--color-text-muted); margin-top: var(--sp-1); }
.form-error { font-size: var(--fs-xs); color: var(--color-danger); margin-top: var(--sp-1); min-height: 1.6rem; }
.form-submit { margin-top: var(--sp-3); }

/* Footer */
.site-footer { background: var(--color-primary-dark); color: rgba(255, 255, 255, 0.85); padding: var(--sp-6) 0 var(--sp-3); margin-top: var(--sp-8); }
.footer-grid { display: grid; gap: var(--sp-5); grid-template-columns: 1fr; }
@media (min-width: 600px) { .footer-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 992px) { .footer-grid { grid-template-columns: repeat(4, 1fr); } }
.footer-title { color: #fff; font-size: var(--fs-lg); margin-bottom: var(--sp-3); font-weight: 600; }
.footer-item { font-size: var(--fs-sm); margin-bottom: var(--sp-2); display: flex; align-items: flex-start; gap: var(--sp-2); }
.footer-item-icon { color: var(--color-accent); flex-shrink: 0; }
.footer-item a { color: rgba(255, 255, 255, 0.85); }
.footer-item a:hover { color: var(--color-accent); }
.footer-qr { width: 12rem; height: 12rem; background: #fff; border-radius: var(--radius-md); padding: var(--sp-2); display: flex; align-items: center; justify-content: center; margin: 0 auto; }
.footer-qr img { width: 100%; height: 100%; object-fit: contain; }
.footer-qr-caption { font-size: var(--fs-xs); text-align: center; margin-top: var(--sp-2); opacity: 0.7; }
.footer-bottom { margin-top: var(--sp-5); padding-top: var(--sp-3); border-top: 1px solid rgba(255, 255, 255, 0.12); text-align: center; font-size: var(--fs-xs); opacity: 0.7; }
.footer-bottom a { color: rgba(255, 255, 255, 0.85); }

/* FAB */
.fab-group { position: fixed; right: var(--sp-3); bottom: var(--sp-5); display: flex; flex-direction: column; gap: var(--sp-2); z-index: 90; }
.fab { width: 5rem; height: 5rem; border-radius: var(--radius-pill); display: flex; align-items: center; justify-content: center; font-size: 2.2rem; color: #fff; box-shadow: var(--shadow-lg); transition: transform .2s; }
.fab:hover { transform: scale(1.08); }
.fab-phone { background: var(--color-accent); }
.fab-wechat { background: #07c160; }
.fab-top { background: var(--color-primary); opacity: 0; pointer-events: none; }
.fab-top.is-visible { opacity: 1; pointer-events: auto; }

/* Testimonial */
.testimonial { background: var(--color-bg-soft); border-left: 4px solid var(--color-accent); padding: var(--sp-4); border-radius: var(--radius-md); margin-bottom: var(--sp-3); }
.testimonial-text { font-size: var(--fs-base); color: var(--color-text); margin-bottom: var(--sp-2); font-style: italic; }
.testimonial-meta { font-size: var(--fs-sm); color: var(--color-text-muted); }

/* Case */
.case-card .case-cover { width: 100%; aspect-ratio: 16 / 10; background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light)); border-radius: var(--radius-md); margin-bottom: var(--sp-3); display: flex; align-items: center; justify-content: center; color: rgba(255, 255, 255, 0.6); font-size: var(--fs-2xl); }

/* FAQ */
.faq-item { border-bottom: 1px solid var(--color-border); padding: var(--sp-3) 0; }
.faq-q { width: 100%; text-align: left; font-size: var(--fs-base); font-weight: 600; color: var(--color-primary); display: flex; justify-content: space-between; align-items: center; padding: var(--sp-2) 0; }
.faq-q::after { content: '+'; font-size: var(--fs-xl); color: var(--color-accent); transition: transform .2s; }
.faq-item.is-open .faq-q::after { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; font-size: var(--fs-sm); color: var(--color-text-muted); line-height: 1.7; }
.faq-item.is-open .faq-a { max-height: 50rem; padding: var(--sp-2) 0; }

/* Map */
.map-wrap { width: 100%; aspect-ratio: 4 / 3; border-radius: var(--radius-md); overflow: hidden; background: var(--color-bg-soft); border: 1px solid var(--color-border); }
.map-wrap iframe { width: 100%; height: 100%; border: 0; }

/* Badges */
.badge-row { display: flex; flex-wrap: wrap; gap: var(--sp-3); justify-content: center; margin-top: var(--sp-5); }
.badge { display: inline-flex; align-items: center; gap: var(--sp-1); padding: var(--sp-1) var(--sp-3); background: var(--color-bg-soft); border: 1px solid var(--color-border); border-radius: var(--radius-pill); font-size: var(--fs-sm); color: var(--color-text); }
.badge-icon { color: var(--color-accent); }

/* A11y */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}