/* ============================================================
   鸿赛（湖州）商贸有限公司 官网
   设计母题：梯田与丰收 —— 深墨绿 × 稻穗金
   ============================================================ */

:root {
  /* 色彩 */
  --green-900: #16301F;
  --green-800: #1F4630;
  --green-700: #2E5E3F;
  --green-500: #5E9464;
  --green-300: #8FB983;
  --green-150: #BBD3AC;
  --green-50:  #EDF3E9;
  --gold:      #C99B3F;
  --gold-deep: #A87F2C;
  --ink:       #223024;
  --ink-soft:  #5C6B59;
  --paper:     #FDFCF8;
  --mist:      #F4F7F0;
  --line:      #E2E8DA;

  /* 字体 */
  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;

  /* 布局 */
  --container: 1120px;
  --radius: 16px;
  --shadow-card: 0 12px 32px rgba(31, 70, 48, 0.10);
}

/* ---------------- 基础 ---------------- */

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--green-700); text-decoration: none; }
a:hover { color: var(--green-800); }

:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 2px;
  border-radius: 4px;
}

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2rem);
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip {
  position: absolute;
  left: 1rem; top: -100%;
  z-index: 100;
  padding: 0.6rem 1.2rem;
  background: var(--green-800);
  color: #fff;
  border-radius: 0 0 10px 10px;
  transition: top 0.2s;
}
.skip:focus { top: 0; color: #fff; }

/* ---------------- 排版 ---------------- */

h1, h2, h3 { font-family: var(--font-display); font-weight: 700; line-height: 1.35; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.35em;
  color: var(--green-700);
}
.eyebrow::before {
  content: "";
  width: 28px; height: 2px;
  background: var(--gold);
}

.section { padding-block: clamp(4rem, 9vw, 6.5rem); }
.section-mist { background: var(--mist); }

/* 锚点跳转时为吸顶导航留出空间 */
section[id] { scroll-margin-top: 84px; }

.section-head { max-width: 720px; margin-bottom: clamp(2.5rem, 5vw, 3.5rem); }
.section-head h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.2rem);
  margin: 0.6rem 0 1rem;
  color: var(--green-900);
}
.section-head p { color: var(--ink-soft); }

/* ---------------- 按钮 ---------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.75rem 1.9rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
  border: 1.5px solid transparent;
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.btn:hover { transform: translateY(-2px); }

.btn-primary { background: var(--green-700); color: #fff; }
.btn-primary:hover { background: var(--green-800); color: #fff; box-shadow: 0 8px 20px rgba(31, 70, 48, 0.25); }

.btn-ghost { border-color: var(--green-700); color: var(--green-700); background: transparent; }
.btn-ghost:hover { background: var(--green-50); color: var(--green-800); }

/* ---------------- 页头导航 ---------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(253, 252, 248, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.site-header.scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 4px 18px rgba(31, 70, 48, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--green-900);
}
.brand-mark { flex: none; }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong {
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: 0.14em;
}
.brand-text small {
  font-size: 0.62rem;
  letter-spacing: 0.3em;
  color: var(--ink-soft);
}

.site-nav { display: flex; align-items: center; gap: clamp(1.2rem, 3vw, 2.6rem); }
.site-nav a {
  position: relative;
  padding: 0.4rem 0.2rem;
  font-size: 0.98rem;
  color: var(--ink);
}
.site-nav a::after {
  content: "";
  position: absolute;
  left: 0.2rem; right: 0.2rem; bottom: -2px;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s;
}
.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after { transform: scaleX(1); }
.site-nav a[aria-current="page"] { color: var(--green-700); font-weight: 600; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px; height: 44px;
  padding: 10px;
  background: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  cursor: pointer;
}
.nav-toggle-bar {
  display: block;
  width: 100%; height: 2px;
  background: var(--green-800);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------------- 首页 Hero（传统轮播图） ---------------- */

.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--green-900) 0%, var(--paper) 100%);
}

.carousel {
  position: relative;
  overflow: hidden;
  background: var(--green-900);
}
.carousel-track {
  display: flex;
  transition: transform 0.65s cubic-bezier(0.4, 0, 0.2, 1);
}
.carousel-slide {
  position: relative;
  flex: 0 0 100%;
}
.carousel-slide img {
  width: 100%;
  height: clamp(340px, 50vw, 560px);
  object-fit: cover;
  display: block;
}
.carousel-caption {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.9rem;
  padding-inline: clamp(1.5rem, 8vw, 7rem);
  background: linear-gradient(90deg, rgba(22, 48, 31, 0.82) 0%, rgba(22, 48, 31, 0.38) 46%, rgba(22, 48, 31, 0) 78%);
  color: #fff;
}
.carousel-caption .eyebrow { color: var(--gold-soft); }
.carousel-caption h1,
.carousel-caption h2 {
  font-size: clamp(1.7rem, 4.2vw, 2.9rem);
  color: #fff;
  letter-spacing: 0.04em;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.25);
}
.carousel-caption p {
  max-width: 30em;
  color: rgba(255, 255, 255, 0.88);
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.25);
}
.carousel-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.1rem;
}

.btn-gold { background: var(--gold); color: var(--green-900); }
.btn-gold:hover { background: #D8AC55; color: var(--green-900); box-shadow: 0 8px 20px rgba(0, 0, 0, 0.22); }
.btn-ghost-light { border-color: rgba(255, 255, 255, 0.72); color: #fff; }
.btn-ghost-light:hover { background: rgba(255, 255, 255, 0.14); color: #fff; }

.carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  display: grid;
  place-items: center;
  width: 46px; height: 46px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.4);
  background: rgba(22, 48, 31, 0.45);
  color: #fff;
  backdrop-filter: blur(4px);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}
.carousel-arrow:hover { background: var(--green-800); border-color: rgba(255, 255, 255, 0.7); }
.carousel-arrow.prev { left: clamp(8px, 2vw, 24px); }
.carousel-arrow.next { right: clamp(8px, 2vw, 24px); }

.carousel-dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  gap: 10px;
}
.carousel-dots button {
  width: 10px; height: 10px;
  padding: 0;
  border: none;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.55);
  cursor: pointer;
  transition: width 0.3s, background 0.3s;
}
.carousel-dots button.active { width: 30px; background: var(--gold); }

/* 事实条 */
.facts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding-block: 0 clamp(3rem, 6vw, 4.5rem);
}
.fact {
  padding: 1.1rem 1.4rem;
  border-left: 1px solid var(--line);
}
.fact:first-child { border-left: none; padding-left: 0; }
.fact dt {
  font-size: 0.8rem;
  letter-spacing: 0.22em;
  color: var(--ink-soft);
}
.fact dd {
  margin-top: 0.3rem;
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--green-800);
}

/* ---------------- 关于我们 ---------------- */

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
.about-grid .section-head { margin-bottom: 0; }
.about-grid .section-head p + p { margin-top: 1rem; }

.about-media {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.about-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.about-media:hover img { transform: scale(1.04); }
.about-media::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: var(--radius);
  pointer-events: none;
}
.about-media .about-tag {
  position: absolute;
  left: 1.2rem; bottom: 1.2rem;
  padding: 0.45rem 1.1rem;
  border-radius: 999px;
  background: rgba(22, 48, 31, 0.82);
  color: #fff;
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  backdrop-filter: blur(4px);
}

/* 企业信息横条 */
.info-card {
  margin-top: clamp(2rem, 4vw, 3rem);
  background: var(--green-50);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.8rem 1.9rem;
}
.info-card h3 {
  display: flex;
  align-items: center;
  gap: 0.5em;
  font-size: 1.05rem;
  color: var(--green-800);
  margin-bottom: 1.1rem;
}
.info-card h3::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--gold);
}
.info-card dl {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.4rem;
}
.info-card .row { display: grid; gap: 0.15rem; align-content: start; }
.info-card dt { font-size: 0.78rem; letter-spacing: 0.2em; color: var(--ink-soft); }
.info-card dd { font-size: 0.95rem; line-height: 1.7; }
.info-card .note { margin-top: 1.2rem; font-size: 0.78rem; color: var(--ink-soft); }

/* ---------------- 业务方向 ---------------- */

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-card);
  border-color: var(--green-150);
}

.card-media {
  position: relative;
  height: 200px;
  overflow: hidden;
}
.card-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.card:hover .card-media img { transform: scale(1.06); }

.card-icon {
  position: absolute;
  left: 1.6rem; bottom: 0;
  transform: translateY(50%);
  z-index: 2;
  display: grid;
  place-items: center;
  width: 52px; height: 52px;
  border-radius: 14px;
  background: #fff;
  border: 1px solid var(--line);
  color: var(--green-700);
  box-shadow: 0 6px 16px rgba(31, 70, 48, 0.12);
}

.card-body {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  flex: 1;
  padding: 2.4rem 1.8rem 1.8rem;
}
.card-body h3 { font-size: 1.2rem; color: var(--green-900); }
.card-body p { font-size: 0.93rem; color: var(--ink-soft); }

.card-tag {
  margin-top: auto;
  padding-top: 0.8rem;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--gold-deep);
}

/* ---------------- 经营流程 ---------------- */

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.6rem;
  counter-reset: step;
  list-style: none;
}
.steps li { position: relative; }

.step-num {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}
.steps h3 { margin: 0.8rem 0 0.5rem; font-size: 1.12rem; color: var(--green-900); }
.steps p { font-size: 0.9rem; color: var(--ink-soft); }

.steps li:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 1.1rem;
  left: calc(100% - 0.4rem);
  width: calc(100% - 3rem);
  border-top: 2px dashed var(--green-150);
}

/* ---------------- 联系我们 ---------------- */

.contact-band {
  position: relative;
  overflow: hidden;
  background: var(--green-800);
  color: #F2F6EE;
}
.contact-band::before {
  content: "";
  position: absolute;
  inset: auto 0 -55% 0;
  background:
    radial-gradient(60% 90% at 90% 100%, rgba(201, 155, 63, 0.18), transparent 70%),
    repeating-linear-gradient(-4deg, transparent 0 46px, rgba(143, 185, 131, 0.10) 46px 49px);
  pointer-events: none;
}

.contact-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4rem);
  padding-block: clamp(3.5rem, 7vw, 5rem);
  align-items: center;
}

.contact-grid .eyebrow { color: var(--green-150); }
.contact-grid h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.2rem);
  margin: 0.6rem 0 1rem;
  color: #fff;
}
.contact-grid p { color: rgba(242, 246, 238, 0.85); }

.contact-info {
  display: grid;
  gap: 1.4rem;
  padding: 1.9rem 2rem;
  background: rgba(253, 252, 248, 0.06);
  border: 1px solid rgba(253, 252, 248, 0.16);
  border-radius: var(--radius);
  backdrop-filter: blur(4px);
}
.contact-info .row { display: grid; gap: 0.2rem; }
.contact-info dt { font-size: 0.78rem; letter-spacing: 0.24em; color: var(--green-150); }
.contact-info dd { font-size: 1rem; line-height: 1.75; }

/* ---------------- 页脚 ---------------- */

.site-footer { background: var(--green-900); color: rgba(242, 246, 238, 0.75); }

.footer-main {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
  padding-block: 2.2rem;
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: #fff;
}
.footer-brand strong {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.14em;
}
.footer-nav { display: flex; flex-wrap: wrap; gap: 1.6rem; }
.footer-nav a { color: rgba(242, 246, 238, 0.75); font-size: 0.9rem; }
.footer-nav a:hover { color: #fff; }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.6rem;
  padding-block: 1.4rem;
  border-top: 1px solid rgba(242, 246, 238, 0.12);
  font-size: 0.8rem;
  color: rgba(242, 246, 238, 0.5);
}
.footer-bottom a { color: rgba(242, 246, 238, 0.5); }
.footer-bottom a:hover { color: rgba(242, 246, 238, 0.85); }

/* ---------------- 法律文档页 ---------------- */

.page-hero { background: linear-gradient(180deg, #F1F6EC 0%, var(--paper) 100%); }
.page-hero .container { padding-block: clamp(3rem, 6vw, 4.5rem) clamp(2rem, 4vw, 3rem); }
.page-hero h1 {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  color: var(--green-900);
  margin: 0.7rem 0 0.8rem;
}
.page-hero .legal-meta { font-size: 0.88rem; color: var(--ink-soft); }

.legal-body { max-width: 820px; padding-block: clamp(1rem, 3vw, 2rem) clamp(4rem, 8vw, 5.5rem); }
.legal-body section { margin-bottom: 2.4rem; }
.legal-body h2 {
  font-size: 1.25rem;
  color: var(--green-800);
  margin-bottom: 0.8rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--line);
}
.legal-body p { margin-bottom: 0.9rem; color: var(--ink); }
.legal-body p:last-child { margin-bottom: 0; }
.legal-body ul, .legal-body ol { margin: 0.6rem 0 1rem 1.4em; }
.legal-body li { margin-bottom: 0.45rem; }
.legal-body .back-home {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  margin-top: 1rem;
  font-weight: 600;
}

/* ---------------- 入场动画 ---------------- */

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s ease;
  transition-delay: var(--d, 0s);
}
.reveal.in { opacity: 1; transform: translateY(0); }

/* ---------------- 响应式 ---------------- */

@media (max-width: 960px) {
  .carousel-slide img { height: clamp(300px, 56vw, 420px); }
  .carousel-caption { gap: 0.6rem; }
  .facts { grid-template-columns: repeat(2, 1fr); row-gap: 1.2rem; }
  .fact:nth-child(3) { border-left: none; padding-left: 0; }
  .about-grid { grid-template-columns: 1fr; }
  .about-media { max-width: 640px; }
  .info-card dl { grid-template-columns: repeat(2, 1fr); }
  .cards { grid-template-columns: 1fr; max-width: 560px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .steps li:not(:last-child)::after { display: none; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .carousel-caption { background: linear-gradient(90deg, rgba(22, 48, 31, 0.72) 0%, rgba(22, 48, 31, 0.25) 70%, transparent 100%); }
  .carousel-arrow { width: 38px; height: 38px; }
  .carousel-dots { bottom: 14px; }
  .nav-toggle { display: flex; }
  .site-nav {
    position: absolute;
    top: 76px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 16px 30px rgba(31, 70, 48, 0.10);
    display: none;
  }
  .site-nav.open { display: flex; }
  .site-nav a {
    padding: 1rem 1.6rem;
    border-top: 1px solid var(--line);
  }
  .site-nav a::after { display: none; }
  .facts { grid-template-columns: 1fr; }
  .fact { border-left: none; padding-left: 0; }
  .steps { grid-template-columns: 1fr; }
  .footer-main { flex-direction: column; align-items: flex-start; }
}

/* ---------------- 减少动态 ---------------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .carousel-track { transition: none; }
  .about-media img, .card-media img { transition: none; }
  .btn:hover, .card:hover { transform: none; }
}