/* ============================================================
   粮信通 · 粮食行业门户前端  —  共享样式系统
   主题：农业丰收绿 + 麦穗金，干净留白、卡片化、响应式
   ============================================================ */

:root {
  /* 主色板 */
  --c-green-900: #15401d;
  --c-green-700: #1f6b30;
  --c-green-600: #2e8b3d;
  --c-green-500: #3da34d;
  --c-green-100: #e6f3e9;
  --c-gold-700: #b9791b;
  --c-gold-500: #e8a33d;
  --c-gold-300: #f4cd86;
  --c-gold-50:  #fdf6e9;

  /* 中性色 */
  --c-ink:    #1c241f;
  --c-body:   #3f4a43;
  --c-muted:  #6b766e;
  --c-line:   #e4e9e4;
  --c-bg:     #faf8f2;
  --c-white:  #ffffff;

  /* 语义色 */
  --c-up:   #d9480f;   /* 价格上涨（红） */
  --c-down: #2e8b3d;   /* 价格下跌（绿） */

  /* 排版与阴影 */
  --font-sans: "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 3px rgba(20,40,25,.06), 0 6px 16px rgba(20,40,25,.06);
  --shadow-md: 0 10px 30px rgba(20,40,25,.10);
  --shadow-lg: 0 18px 50px rgba(20,40,25,.16);
  --maxw: 1200px;
  --nav-h: 68px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--c-body);
  background: var(--c-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1,h2,h3,h4 { color: var(--c-ink); line-height: 1.25; margin: 0 0 .5em; font-weight: 700; }
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.section { padding: 76px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 48px; }
.section-head .eyebrow {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .12em;
  color: var(--c-green-700); background: var(--c-green-100);
  padding: 5px 14px; border-radius: 999px; margin-bottom: 14px;
}
.section-head h2 { font-size: clamp(26px, 3.4vw, 38px); }
.section-head p { color: var(--c-muted); font-size: 16px; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 999px; font-weight: 600; font-size: 15px;
  border: 1px solid transparent; cursor: pointer; transition: .22s ease; white-space: nowrap;
}
.btn-primary { background: var(--c-green-600); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--c-green-700); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-gold { background: var(--c-gold-500); color: #3a2700; }
.btn-gold:hover { background: var(--c-gold-700); color: #fff; transform: translateY(-2px); }
.btn-outline { background: transparent; color: var(--c-green-700); border-color: var(--c-green-500); }
.btn-outline:hover { background: var(--c-green-100); }

/* ===== 顶部导航 ===== */
.nav {
  position: sticky; top: 0; z-index: 100; height: var(--nav-h);
  background: rgba(250,248,242,.86); backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--c-line);
}
.nav .container { display: flex; align-items: center; height: 100%; gap: 28px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; color: var(--c-green-900); }
.brand .logo {
  width: 38px; height: 38px; border-radius: 11px; flex: none;
  background: linear-gradient(135deg, var(--c-green-600), var(--c-gold-500));
  display: grid; place-items: center; color: #fff; font-size: 20px; box-shadow: var(--shadow-sm);
}
.brand small { display: block; font-size: 11px; font-weight: 600; color: var(--c-muted); letter-spacing: .08em; }
.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-links a {
  padding: 9px 15px; border-radius: 9px; font-weight: 600; font-size: 15px; color: var(--c-body);
  transition: .18s;
}
.nav-links a:hover { color: var(--c-green-700); background: var(--c-green-100); }
.nav-links a.active { color: var(--c-green-700); background: var(--c-green-100); }
.nav-actions { display: flex; gap: 10px; align-items: center; }
.nav-toggle { display: none; background: none; border: 0; font-size: 26px; cursor: pointer; color: var(--c-green-900); }

/* ===== Hero ===== */
.hero {
  position: relative; padding: 86px 0 96px; overflow: hidden;
  background:
    radial-gradient(1100px 480px at 85% -10%, rgba(232,163,61,.20), transparent 60%),
    radial-gradient(900px 460px at 0% 110%, rgba(46,139,61,.18), transparent 55%),
    linear-gradient(180deg, #fefcf6, #f6f4ea);
}
.hero .container { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.hero h1 { font-size: clamp(32px, 4.6vw, 54px); line-height: 1.12; letter-spacing: -.5px; }
.hero h1 .hl { color: var(--c-green-700); position: relative; }
.hero h1 .hl::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 6px; height: 12px;
  background: var(--c-gold-300); opacity: .55; z-index: -1; border-radius: 4px;
}
.hero p.lead { font-size: 18px; color: var(--c-muted); max-width: 540px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 12px; }
.hero-stats { display: flex; gap: 30px; margin-top: 34px; flex-wrap: wrap; }
.hero-stats .stat strong { display: block; font-size: 30px; color: var(--c-green-700); font-weight: 800; }
.hero-stats .stat span { font-size: 13px; color: var(--c-muted); }

/* Hero 视觉卡 */
.hero-visual { position: relative; }
.price-card {
  background: var(--c-white); border-radius: 20px; box-shadow: var(--shadow-lg);
  padding: 22px 22px 10px; border: 1px solid var(--c-line);
}
.price-card .pc-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.price-card .pc-head h4 { margin: 0; font-size: 16px; }
.price-card .pc-head .tag { font-size: 12px; color: var(--c-green-700); background: var(--c-green-100); padding: 3px 10px; border-radius: 999px; }
.pc-row { display: grid; grid-template-columns: 1fr auto auto; gap: 12px; align-items: center; padding: 12px 4px; border-top: 1px solid var(--c-line); }
.pc-row .name { font-weight: 700; color: var(--c-ink); }
.pc-row .name small { display: block; font-weight: 500; color: var(--c-muted); font-size: 12px; }
.pc-row .val { font-weight: 800; font-variant-numeric: tabular-nums; }
.pc-row .chg { font-size: 13px; font-weight: 700; text-align: right; min-width: 64px; font-variant-numeric: tabular-nums; }
.chg.up { color: var(--c-up); } .chg.down { color: var(--c-down); }

/* ===== 服务卡片 ===== */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: var(--c-white); border: 1px solid var(--c-line); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow-sm); transition: .25s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.card .ic {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  font-size: 26px; background: var(--c-green-100); color: var(--c-green-700); margin-bottom: 16px;
}
.card h3 { font-size: 19px; margin-bottom: 8px; }
.card p { color: var(--c-muted); font-size: 15px; margin: 0; }
.card .more { display: inline-block; margin-top: 14px; color: var(--c-green-700); font-weight: 700; font-size: 14px; }
.card .more::after { content: " →"; transition: .2s; }
.card .more:hover::after { margin-left: 4px; }

/* ===== 数据条 / 特性区 ===== */
.feature-band { background: var(--c-green-900); color: #eaf3ec; position: relative; overflow: hidden; }
.feature-band::before { content:""; position:absolute; inset:0; background: radial-gradient(700px 300px at 90% 0%, rgba(232,163,61,.22), transparent 60%); }
.feature-band .container { position: relative; }
.feature-band .section-head h2, .feature-band .section-head .eyebrow { color: #fff; }
.feature-band .section-head .eyebrow { background: rgba(255,255,255,.12); }
.feature-band .section-head p { color: #c7d8cc; }
.feat-row { display: grid; grid-template-columns: repeat(4,1fr); gap: 22px; }
.feat { text-align: center; padding: 20px; border-radius: var(--radius); background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.08); }
.feat .big { font-size: 34px; font-weight: 800; color: var(--c-gold-300); }
.feat .lbl { color: #cfe0d4; font-size: 14px; margin-top: 4px; }

/* ===== 品种展示 ===== */
.var-card { position: relative; overflow: hidden; padding: 0; }
.var-card .thumb {
  height: 150px; display: grid; place-items: center; font-size: 58px;
  background: linear-gradient(135deg, var(--c-green-100), var(--c-gold-50));
}
.var-card .body { padding: 18px 20px 20px; }
.var-card h3 { font-size: 18px; margin-bottom: 4px; }
.var-card .meta { font-size: 13px; color: var(--c-muted); display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 10px; }
.var-card .meta b { color: var(--c-green-700); }
.var-card p { font-size: 14px; color: var(--c-muted); margin: 0; }

/* ===== 资讯列表 ===== */
.news-card { display: grid; grid-template-columns: 120px 1fr; gap: 0; overflow: hidden; padding: 0; }
.news-card .date {
  background: var(--c-green-100); color: var(--c-green-700); display: grid; place-items: center; text-align: center;
}
.news-card .date b { font-size: 30px; font-weight: 800; line-height: 1; }
.news-card .date span { font-size: 13px; }
.news-card .body { padding: 20px 24px; }
.news-card .cat { font-size: 12px; font-weight: 700; color: var(--c-gold-700); letter-spacing: .05em; }
.news-card h3 { font-size: 17px; margin: 6px 0 8px; }
.news-card p { font-size: 14px; color: var(--c-muted); margin: 0; }

/* ===== 价格行情表 ===== */
.table-wrap { background: var(--c-white); border: 1px solid var(--c-line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
table.market { width: 100%; border-collapse: collapse; font-size: 15px; }
table.market th, table.market td { padding: 14px 18px; text-align: left; }
table.market thead th { background: var(--c-green-900); color: #eaf3ec; font-weight: 700; font-size: 14px; }
table.market tbody tr { border-top: 1px solid var(--c-line); transition: .15s; }
table.market tbody tr:hover { background: var(--c-green-100); }
table.market td.num, table.market th.num { text-align: right; font-variant-numeric: tabular-nums; }
.pill { display: inline-block; padding: 3px 11px; border-radius: 999px; font-size: 13px; font-weight: 700; }
.pill.up { background: #fdecea; color: var(--c-up); }
.pill.down { background: #e9f6ec; color: var(--c-down); }
.pill.flat { background: #eef0ee; color: var(--c-muted); }

/* ===== 公告 / 标签栏 ===== */
.tabs { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-bottom: 30px; }
.tab {
  padding: 9px 20px; border-radius: 999px; border: 1px solid var(--c-line); background: var(--c-white);
  font-weight: 600; cursor: pointer; transition: .2s; color: var(--c-muted);
}
.tab.active { background: var(--c-green-600); color: #fff; border-color: var(--c-green-600); }

/* ===== 表单 ===== */
.field { margin-bottom: 16px; }
.field label { display: block; font-weight: 600; margin-bottom: 6px; color: var(--c-ink); font-size: 14px; }
.field input, .field textarea, .field select {
  width: 100%; padding: 12px 14px; border: 1px solid var(--c-line); border-radius: var(--radius-sm);
  font: inherit; background: var(--c-white); color: var(--c-ink); transition: .18s;
}
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--c-green-500); box-shadow: 0 0 0 3px var(--c-green-100); }

/* ===== CTA 区 ===== */
.cta {
  background: linear-gradient(120deg, var(--c-green-700), var(--c-green-900));
  color: #eaf3ec; border-radius: 22px; padding: 54px; text-align: center; position: relative; overflow: hidden;
}
.cta::after { content:""; position:absolute; right:-60px; top:-60px; width:240px; height:240px; border-radius:50%; background: rgba(232,163,61,.25); }
.cta h2 { color: #fff; font-size: clamp(24px,3vw,34px); }
.cta p { color: #cfe0d4; max-width: 560px; margin: 0 auto 24px; }

/* ===== 页脚 ===== */
.footer { background: #122c19; color: #b9cbc0; padding: 56px 0 24px; }
.footer .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 34px; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 16px; }
.footer a { color: #b9cbc0; display: block; padding: 5px 0; font-size: 14px; transition: .15s; }
.footer a:hover { color: var(--c-gold-300); }
.footer .brand { color: #fff; margin-bottom: 12px; }
.footer .brand small { color: #8fa89a; }
.footer p.desc { font-size: 14px; max-width: 300px; }
.footer .bottom { border-top: 1px solid rgba(255,255,255,.10); margin-top: 36px; padding-top: 18px; font-size: 13px; color: #8fa89a; display: flex; flex-direction: column; align-items: center; text-align: center; gap: 8px; }

/* ===== 面包屑 / 页眉条 ===== */
.page-hero { background: linear-gradient(120deg, var(--c-green-700), var(--c-green-900)); color: #eaf3ec; padding: 56px 0; }
.page-hero h1 { color: #fff; font-size: clamp(28px,3.4vw,40px); margin-bottom: 8px; }
.page-hero p { color: #cfe0d4; margin: 0; max-width: 640px; }
.crumbs { font-size: 13px; color: var(--c-gold-300); margin-bottom: 14px; }
.crumbs a { color: #cfe0d4; }
.crumbs a:hover { color: #fff; }

/* ===== 公告条 ===== */
.marquee { background: var(--c-gold-50); border-bottom: 1px solid var(--c-gold-300); color: var(--c-gold-700); font-size: 14px; }
.marquee .container { display: flex; align-items: center; gap: 12px; padding: 10px 20px; }
.marquee .badge { background: var(--c-gold-500); color: #3a2700; font-weight: 700; padding: 2px 10px; border-radius: 6px; font-size: 12px; flex: none; }
.marquee .track { overflow: hidden; white-space: nowrap; flex: 1; }
.marquee .track span { display: inline-block; padding-left: 100%; animation: scrollx 26s linear infinite; }
@keyframes scrollx { to { transform: translateX(-100%); } }

/* ===== 回到顶部 ===== */
#toTop {
  position: fixed; right: 22px; bottom: 22px; width: 46px; height: 46px; border: 0; border-radius: 50%;
  background: var(--c-green-600); color: #fff; font-size: 22px; cursor: pointer; box-shadow: var(--shadow-md);
  opacity: 0; pointer-events: none; transition: .25s; z-index: 90;
}
#toTop.show { opacity: 1; pointer-events: auto; }
#toTop:hover { background: var(--c-green-700); }

/* ===== 进场动画 ===== */
.reveal { opacity: 0; transform: translateY(22px); transition: .6s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }

/* ===== 响应式 ===== */
@media (max-width: 980px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2,1fr); }
  .feat-row { grid-template-columns: repeat(2,1fr); }
  .hero .container { grid-template-columns: 1fr; gap: 36px; }
  .hero-visual { order: -1; }
  .footer .cols { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav-links, .nav-actions .btn-outline { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open {
    display: flex; flex-direction: column; position: absolute; top: var(--nav-h); left: 0; right: 0;
    background: var(--c-white); border-bottom: 1px solid var(--c-line); padding: 12px; gap: 2px; box-shadow: var(--shadow-md);
  }
  .grid-2, .grid-3, .grid-4, .feat-row { grid-template-columns: 1fr; }
  .section { padding: 54px 0; }
  .news-card { grid-template-columns: 84px 1fr; }
  .cta { padding: 38px 22px; }
  .footer .cols { grid-template-columns: 1fr; }
}

/* ===== 台账类型标签 / 统计卡 ===== */
.pill.in  { background: #e9f6ec; color: var(--c-green-700); }
.pill.out { background: #fdf0e3; color: var(--c-gold-700); }

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 26px; }
.stat-card {
  background: var(--c-white); border: 1px solid var(--c-line); border-radius: var(--radius);
  padding: 20px; text-align: center; box-shadow: var(--shadow-sm);
}
.stat-card .big { font-size: 28px; font-weight: 800; color: var(--c-green-700); font-variant-numeric: tabular-nums; }
.stat-card .lbl { font-size: 13px; color: var(--c-muted); margin-top: 4px; }

.ledger-form { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 18px; }
.ledger-form .field.full { grid-column: 1 / -1; }

@media (max-width: 980px) { .stat-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .stat-grid { grid-template-columns: 1fr; } .ledger-form { grid-template-columns: 1fr; } }