/* ============================================================
   Design · 界 · 设计师工作台 设计系统 v1.1
   ============================================================ */

:root {
  /* 品牌色：墨蓝（工程/信任）+ 琥珀金（建筑/质感） */
  --zj-ink:        #16283C;
  --zj-ink-2:      #1E3A5C;
  --zj-blue:       #2B5A8C;
  --zj-blue-light: #EAF1F8;
  --zj-gold:       #B98A2F;
  --zj-gold-light: #F6EDDC;
  --zj-bg:         #F6F8FA;
  --zj-card:       #FFFFFF;
  --zj-line:       #E3E9F0;
  --zj-line-2:     #CFD8E3;
  --zj-text:       #22303F;
  --zj-text-2:     #5C6B7A;
  --zj-text-3:     #8A97A5;
  --zj-danger:     #C0392B;
  --zj-success:    #1E7E5C;
  --zj-radius:     12px;
  --zj-radius-sm:  8px;
  --zj-shadow:     0 1px 2px rgba(22,40,60,.06), 0 4px 16px rgba(22,40,60,.06);
  --zj-shadow-lg:  0 4px 12px rgba(22,40,60,.10), 0 16px 40px rgba(22,40,60,.10);
  --zj-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
             "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--zj-font);
  background: var(--zj-bg);
  color: var(--zj-text);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--zj-blue); text-decoration: none; }
a:hover { text-decoration: underline; }

img, svg { display: block; }

.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid transparent; border-radius: var(--zj-radius-sm);
  padding: 10px 22px; font-size: 14px; font-weight: 500; line-height: 1.4;
  cursor: pointer; transition: all .18s ease; font-family: var(--zj-font);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--zj-ink); color: #fff; }
.btn-primary:hover { background: var(--zj-ink-2); text-decoration: none; }
.btn-gold { background: var(--zj-gold); color: #fff; }
.btn-gold:hover { background: #a57a28; text-decoration: none; }
.btn-outline { border-color: var(--zj-line-2); background: transparent; color: var(--zj-text); }
.btn-outline:hover { border-color: var(--zj-blue); color: var(--zj-blue); text-decoration: none; }
.btn-ghost { background: transparent; color: var(--zj-blue); }
.btn-ghost:hover { background: var(--zj-blue-light); text-decoration: none; }
.btn-lg { padding: 14px 32px; font-size: 16px; border-radius: 10px; }
.btn-block { width: 100%; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* ---------- 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--zj-line);
}
.nav-inner { display: flex; align-items: center; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 500; color: var(--zj-text); }
.logo:hover { text-decoration: none; }
.logo .logo-mark {
  width: 34px; height: 34px; border-radius: 9px; background: var(--zj-ink);
  display: flex; align-items: center; justify-content: center; color: var(--zj-gold);
}
.logo .logo-sub { font-size: 11px; color: var(--zj-text-3); letter-spacing: 2px; font-weight: 400; margin-top: -2px; }
.nav-links { display: flex; align-items: center; gap: 28px; margin-left: 44px; }
.nav-links a { color: var(--zj-text-2); font-size: 14px; font-weight: 400; }
.nav-links a:hover, .nav-links a.active { color: var(--zj-ink); text-decoration: none; }
.nav-actions { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.nav-user { display: flex; align-items: center; gap: 10px; }
.avatar {
  width: 32px; height: 32px; border-radius: 50%; background: var(--zj-ink);
  color: var(--zj-gold); display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 500;
}

/* ---------- Hero ---------- */
.hero { padding: 88px 0 72px; text-align: center; background: linear-gradient(180deg, #FFFFFF 0%, var(--zj-bg) 100%); }
.hero .badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--zj-gold-light); color: #8a6420;
  border: 1px solid #e8d3a8; border-radius: 999px; padding: 6px 14px; font-size: 13px;
}
.hero h1 { font-size: 46px; font-weight: 500; line-height: 1.25; margin: 22px auto 18px; max-width: 760px; color: var(--zj-ink); letter-spacing: 1px; }
.hero h1 .gold { color: var(--zj-gold); }
.hero p.lead { font-size: 18px; color: var(--zj-text-2); max-width: 620px; margin: 0 auto 34px; }
.hero-actions { display: flex; gap: 14px; justify-content: center; }

.hero-stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
  max-width: 760px; margin: 56px auto 0;
}
.stat-card { background: var(--zj-card); border: 1px solid var(--zj-line); border-radius: var(--zj-radius); padding: 20px; }
.stat-card .num { font-size: 26px; font-weight: 500; color: var(--zj-ink); }
.stat-card .label { font-size: 13px; color: var(--zj-text-3); margin-top: 2px; }

/* ---------- Section ---------- */
.section { padding: 76px 0; }
.section-head { text-align: center; margin-bottom: 44px; }
.section-head .kicker { font-size: 13px; letter-spacing: 3px; color: var(--zj-gold); text-transform: uppercase; }
.section-head h2 { font-size: 30px; font-weight: 500; color: var(--zj-ink); margin: 8px 0 10px; }
.section-head p { color: var(--zj-text-2); max-width: 560px; margin: 0 auto; }

/* ---------- 产品卡片 ---------- */
.product-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.product-card {
  background: var(--zj-card); border: 1px solid var(--zj-line); border-radius: 16px;
  padding: 30px 28px; transition: all .2s ease; position: relative; overflow: hidden;
}
.product-card:hover { box-shadow: var(--zj-shadow-lg); transform: translateY(-3px); border-color: var(--zj-line-2); }
.product-card .p-icon {
  width: 52px; height: 52px; border-radius: 13px; margin-bottom: 18px;
  display: flex; align-items: center; justify-content: center;
}
.p-icon.ky { background: var(--zj-blue-light); color: var(--zj-blue); }
.p-icon.gf { background: var(--zj-gold-light); color: var(--zj-gold); }
.product-card h3 { font-size: 20px; font-weight: 500; color: var(--zj-ink); margin-bottom: 8px; }
.product-card .p-desc { color: var(--zj-text-2); font-size: 14px; margin-bottom: 14px; min-height: 44px; }
.product-card .p-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.tag {
  display: inline-flex; align-items: center; font-size: 12px; color: var(--zj-text-2);
  background: var(--zj-bg); border: 1px solid var(--zj-line); border-radius: 999px; padding: 3px 11px;
}
.tag.gold { background: var(--zj-gold-light); color: #8a6420; border-color: #e8d3a8; }
.tag.blue { background: var(--zj-blue-light); color: var(--zj-blue); border-color: #d4e3f3; }
.p-link { font-size: 14px; font-weight: 500; display: inline-flex; align-items: center; gap: 6px; }

/* ---------- 产品矩阵 ---------- */
.p-badge {
  position: absolute; top: 18px; right: 18px; font-size: 11px;
  padding: 3px 10px; border-radius: 999px; border: 1px solid var(--zj-line);
  color: var(--zj-text-3); background: var(--zj-bg); display: inline-flex; align-items: center; gap: 5px;
}
.p-badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; opacity: .85; }
.p-badge.live { background: #e8f5ec; color: #1e7e46; border-color: #bfe3cc; }
.p-badge.soon { background: var(--zj-bg); color: var(--zj-text-3); border-color: var(--zj-line-2); }
.p-badge.stand { background: var(--zj-gold-light); color: #8a6420; border-color: #e8d3a8; }
.group-label {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  font-size: 15px; font-weight: 600; color: var(--zj-ink); margin: 46px 0 18px;
}
.group-label::before { content: ""; width: 4px; height: 18px; border-radius: 2px; background: var(--zj-blue); }
.group-label .g-note { font-size: 13px; font-weight: 400; color: var(--zj-text-3); }
.matrix-note {
  display: flex; align-items: center; gap: 8px; margin-top: 26px; padding: 14px 18px;
  background: var(--zj-bg); border: 1px dashed var(--zj-line-2); border-radius: 12px;
  color: var(--zj-text-2); font-size: 13px;
}

/* ---------- 定价 ---------- */
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: stretch; }
.price-card {
  background: var(--zj-card); border: 1px solid var(--zj-line); border-radius: 16px;
  padding: 32px 28px; display: flex; flex-direction: column; position: relative;
}
.price-card.featured { border: 2px solid var(--zj-ink); box-shadow: var(--zj-shadow-lg); }
.price-card .pc-name { font-size: 17px; font-weight: 500; color: var(--zj-ink); }
.price-card .pc-price { margin: 14px 0 4px; display: flex; align-items: baseline; gap: 4px; }
.price-card .pc-price .cur { font-size: 20px; color: var(--zj-text); }
.price-card .pc-price .amt { font-size: 44px; font-weight: 500; color: var(--zj-ink); letter-spacing: -1px; }
.price-card .pc-price .per { font-size: 14px; color: var(--zj-text-3); }
.price-card .pc-desc { font-size: 13px; color: var(--zj-text-2); margin-bottom: 20px; }
.price-card ul { list-style: none; margin: 0 0 26px; flex: 1; }
.price-card li { font-size: 14px; color: var(--zj-text-2); padding: 7px 0 7px 26px; position: relative; }
.price-card li::before {
  content: ""; position: absolute; left: 2px; top: 13px; width: 14px; height: 14px;
  background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" fill="none" stroke="%23B98A2F" stroke-width="2"><path d="M3 8.5l3.5 3.5L13 4.5"/></svg>') center/contain no-repeat;
}
.price-ribbon {
  position: absolute; top: 0; right: 24px; background: var(--zj-ink); color: var(--zj-gold);
  font-size: 12px; padding: 5px 14px; border-radius: 0 0 8px 8px;
}

/* ---------- 表单 ---------- */
.form-wrap {
  background: var(--zj-card); border: 1px solid var(--zj-line); border-radius: 16px;
  padding: 36px 34px; box-shadow: var(--zj-shadow);
}
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 13px; font-weight: 500; color: var(--zj-text); margin-bottom: 7px; }
.field input {
  width: 100%; border: 1px solid var(--zj-line-2); border-radius: var(--zj-radius-sm);
  padding: 11px 14px; font-size: 14px; font-family: var(--zj-font); background: #fff; color: var(--zj-text);
  transition: border-color .15s;
}
.field input:focus { outline: none; border-color: var(--zj-blue); box-shadow: 0 0 0 3px rgba(43,90,140,.12); }
.field .hint { font-size: 12px; color: var(--zj-text-3); margin-top: 6px; }

/* ---------- 页面骨架（工作台/对话） ---------- */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
  width: 240px; flex-shrink: 0; background: var(--zj-ink); color: #DCE6F0;
  display: flex; flex-direction: column; padding: 20px 14px;
  position: sticky; top: 0; height: 100vh;
}
.sidebar .logo { color: #fff; margin-bottom: 26px; padding: 0 8px; }
.sidebar .logo .logo-mark { background: rgba(255,255,255,.08); }
.sidebar .logo-sub { color: #8fa6bd; }
.side-nav { list-style: none; flex: 1; }
.side-nav li { margin-bottom: 4px; }
.side-nav a {
  display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: var(--zj-radius-sm);
  color: #AFC3D6; font-size: 14px; transition: all .15s;
}
.side-nav a:hover { background: rgba(255,255,255,.06); color: #fff; text-decoration: none; }
.side-nav a.active { background: rgba(255,255,255,.12); color: #fff; font-weight: 500; }
.side-nav a svg { flex-shrink: 0; opacity: .85; }
.sidebar-foot { border-top: 1px solid rgba(255,255,255,.1); padding-top: 14px; }
.sidebar-foot a { display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: var(--zj-radius-sm); color: #AFC3D6; font-size: 13px; }
.sidebar-foot a:hover { background: rgba(255,255,255,.06); color: #fff; text-decoration: none; }
.sidebar .side-user { display: flex; align-items: center; gap: 10px; padding: 8px 12px; }
.sidebar .side-user .avatar { background: rgba(255,255,255,.12); color: var(--zj-gold); }
.sidebar .side-user .uname { font-size: 13px; color: #E6EDF5; }
.sidebar .side-user .uplan { font-size: 11px; color: #8fa6bd; }

.main { flex: 1; min-width: 0; padding: 32px 40px; }
.page-head { margin-bottom: 28px; }
.page-head h1 { font-size: 24px; font-weight: 500; color: var(--zj-ink); }
.page-head p { color: var(--zj-text-2); font-size: 14px; margin-top: 4px; }

/* 工作台卡片 */
.work-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.work-card {
  background: var(--zj-card); border: 1px solid var(--zj-line); border-radius: 16px;
  padding: 28px; transition: all .2s ease; cursor: pointer; display: block; color: inherit;
}
.work-card:hover { box-shadow: var(--zj-shadow-lg); transform: translateY(-2px); text-decoration: none; }
.work-card .wc-top { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 14px; }
.work-card h3 { font-size: 18px; font-weight: 500; color: var(--zj-ink); }
.work-card .wc-desc { font-size: 13px; color: var(--zj-text-2); margin-bottom: 16px; }
.work-card .wc-examples { display: flex; flex-wrap: wrap; gap: 6px; }
.example-chip {
  font-size: 12px; color: var(--zj-text-2); background: var(--zj-bg);
  border: 1px solid var(--zj-line); border-radius: 999px; padding: 3px 10px;
}
.work-card .wc-go { margin-top: 18px; font-size: 13px; font-weight: 500; color: var(--zj-blue); display: inline-flex; align-items: center; gap: 4px; }

/* 对话界面 */
.chat-shell { display: flex; height: calc(100vh - 64px); }
.chat-side {
  width: 260px; flex-shrink: 0; border-right: 1px solid var(--zj-line);
  background: #fff; padding: 18px 14px; overflow-y: auto;
}
.chat-side h4 { font-size: 12px; color: var(--zj-text-3); letter-spacing: 1px; margin: 0 0 10px 6px; font-weight: 500; }
.agent-switch { margin-bottom: 22px; }
.agent-opt {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 10px;
  border: 1px solid transparent; cursor: pointer; font-size: 14px; color: var(--zj-text-2);
  transition: all .15s;
}
.agent-opt:hover { background: var(--zj-bg); }
.agent-opt.active { background: var(--zj-blue-light); border-color: #d4e3f3; color: var(--zj-ink); font-weight: 500; }
.chat-hist { list-style: none; }
.chat-hist li a {
  display: block; padding: 8px 12px; border-radius: 8px; font-size: 13px; color: var(--zj-text-2);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.chat-hist li a:hover { background: var(--zj-bg); text-decoration: none; color: var(--zj-text); }
.chat-hist .empty { font-size: 12px; color: var(--zj-text-3); padding: 6px 12px; }

.chat-main { flex: 1; min-width: 0; display: flex; flex-direction: column; background: var(--zj-card); }
.chat-top {
  padding: 16px 28px; border-bottom: 1px solid var(--zj-line); display: flex; align-items: center; gap: 12px;
}
.chat-top .ct-name { font-size: 15px; font-weight: 500; color: var(--zj-ink); }
.chat-top .ct-sub { font-size: 12px; color: var(--zj-text-3); }
.chat-top .ct-badge { margin-left: auto; font-size: 12px; padding: 4px 12px; border-radius: 999px; }
.chat-top .ct-badge.free { background: var(--zj-gold-light); color: #8a6420; }
.chat-top .ct-badge.pro { background: var(--zj-blue-light); color: var(--zj-blue); }

.chat-body { flex: 1; overflow-y: auto; padding: 28px; display: flex; flex-direction: column; gap: 20px; }
.msg { display: flex; gap: 12px; max-width: 78%; }
.msg .m-avatar { width: 34px; height: 34px; border-radius: 9px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; }
.msg.bot .m-avatar { background: var(--zj-ink); color: var(--zj-gold); }
.msg.user { align-self: flex-end; flex-direction: row-reverse; }
.msg.user .m-avatar { background: var(--zj-blue); color: #fff; }
.msg .m-bubble { padding: 12px 16px; border-radius: 12px; font-size: 14px; line-height: 1.75; }
.msg.bot .m-bubble { background: var(--zj-bg); border: 1px solid var(--zj-line); }
.msg.user .m-bubble { background: var(--zj-blue); color: #fff; }
.msg .m-bubble p { margin-bottom: 8px; }
.msg .m-bubble p:last-child { margin-bottom: 0; }
.msg .m-bubble .qa-item { border: 1px solid var(--zj-line-2); border-radius: 8px; padding: 10px 12px; margin-top: 8px; background: #fff; }
.msg .m-bubble .qa-item .q { font-weight: 500; color: var(--zj-ink); font-size: 13px; }
.msg .m-bubble .qa-item .a { color: var(--zj-text-2); font-size: 13px; margin-top: 4px; }
.msg .m-time { font-size: 11px; color: var(--zj-text-3); margin-top: 4px; }

.chat-input {
  border-top: 1px solid var(--zj-line); padding: 18px 28px 22px; background: #fff;
}
.chat-input .input-row { display: flex; gap: 12px; align-items: flex-end; }
.chat-input textarea {
  flex: 1; border: 1px solid var(--zj-line-2); border-radius: 12px; padding: 12px 16px;
  font-size: 14px; font-family: var(--zj-font); resize: none; min-height: 48px; max-height: 160px;
  color: var(--zj-text); line-height: 1.6;
}
.chat-input textarea:focus { outline: none; border-color: var(--zj-blue); box-shadow: 0 0 0 3px rgba(43,90,140,.12); }
.chat-suggests { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.suggest-chip {
  font-size: 12px; color: var(--zj-text-2); background: var(--zj-bg); border: 1px solid var(--zj-line);
  border-radius: 999px; padding: 5px 13px; cursor: pointer; transition: all .15s;
}
.suggest-chip:hover { border-color: var(--zj-blue); color: var(--zj-blue); }

/* 订阅墙弹层 */
.overlay { position: fixed; inset: 0; background: rgba(15,28,42,.5); display: flex; align-items: center; justify-content: center; z-index: 100; }
.modal {
  background: #fff; border-radius: 18px; max-width: 440px; width: calc(100% - 48px);
  padding: 34px 32px; text-align: center; box-shadow: var(--zj-shadow-lg);
}
.modal .m-icon { width: 56px; height: 56px; border-radius: 14px; background: var(--zj-gold-light); color: var(--zj-gold); display: flex; align-items: center; justify-content: center; margin: 0 auto 18px; }
.modal h3 { font-size: 20px; font-weight: 500; color: var(--zj-ink); margin-bottom: 10px; }
.modal p { font-size: 14px; color: var(--zj-text-2); margin-bottom: 22px; }
.modal .m-actions { display: flex; flex-direction: column; gap: 10px; }
.modal .m-link { font-size: 13px; color: var(--zj-text-3); cursor: pointer; }
.modal .m-link:hover { color: var(--zj-blue); }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--zj-line); background: #fff; padding: 48px 0 32px; }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 24px; }
.footer .f-brand p { color: var(--zj-text-3); font-size: 13px; margin-top: 8px; max-width: 300px; }
.footer .f-col h5 { font-size: 13px; font-weight: 500; color: var(--zj-text); margin-bottom: 12px; }
.footer .f-col a { display: block; color: var(--zj-text-2); font-size: 13px; padding: 4px 0; }
.footer .f-col a:hover { color: var(--zj-blue); text-decoration: none; }
.footer .f-bottom { margin-top: 32px; padding-top: 20px; border-top: 1px solid var(--zj-line); color: var(--zj-text-3); font-size: 12px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }

/* ---------- 账户/用量 ---------- */
.account-grid { display: grid; grid-template-columns: 1fr 1.6fr; gap: 24px; }
.panel { background: var(--zj-card); border: 1px solid var(--zj-line); border-radius: 16px; padding: 26px; }
.panel h3 { font-size: 16px; font-weight: 500; color: var(--zj-ink); margin-bottom: 16px; }
.kv { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px dashed var(--zj-line); font-size: 14px; }
.kv:last-child { border-bottom: none; }
.kv .k { color: var(--zj-text-2); }
.kv .v { color: var(--zj-text); font-weight: 500; }
.plan-pill {
  display: inline-flex; align-items: center; gap: 6px; padding: 4px 14px; border-radius: 999px;
  font-size: 13px; font-weight: 500;
}
.plan-pill.free { background: var(--zj-gold-light); color: #8a6420; }
.plan-pill.pro { background: var(--zj-blue-light); color: var(--zj-blue); }
.bar-track { height: 8px; border-radius: 99px; background: var(--zj-line); overflow: hidden; margin: 6px 0 4px; }
.bar-fill { height: 100%; border-radius: 99px; background: var(--zj-gold); }
.meter-label { display: flex; justify-content: space-between; font-size: 12px; color: var(--zj-text-3); }

/* ---------- 工具类 ---------- */
.center { text-align: center; }
.mt16 { margin-top: 16px; } .mt24 { margin-top: 24px; } .mt40 { margin-top: 40px; }
.muted { color: var(--zj-text-2); }
.alert {
  border-radius: var(--zj-radius-sm); padding: 12px 16px; font-size: 13px; margin-bottom: 16px;
}
.alert-error { background: #FDF0EF; border: 1px solid #F2C9C5; color: var(--zj-danger); }
.alert-success { background: #EDF7F2; border: 1px solid #BFE3D2; color: var(--zj-success); }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .product-grid, .work-grid { grid-template-columns: 1fr; }
  .price-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .account-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 34px; }
  .sidebar { width: 72px; padding: 18px 10px; }
  .sidebar .logo { justify-content: center; }
  .sidebar .logo-text, .sidebar .side-user .uinfo, .side-nav a span, .sidebar-foot a span { display: none; }
  .side-nav a { justify-content: center; padding: 12px; }
  .sidebar-foot a { justify-content: center; padding: 12px; }
  .main { padding: 24px 18px; }
  .msg { max-width: 92%; }
}

/* ============================================================
   移动端适配 v1.3 —— 640 / 480 / 400 三级断点
   原有 960px 断点只管平板，手机尺寸（375~430px）此前完全未覆盖
   ============================================================ */

/* 兜底：禁止横向滚动（避免任何元素意外撑宽页面） */
body { overflow-x: hidden; }
img, svg, video { max-width: 100%; }

@media (max-width: 640px) {
  .container { padding: 0 18px; }

  /* 导航：压缩间距 */
  .nav-inner { height: 58px; }
  .nav-links { gap: 16px; margin-left: 18px; }
  .nav-links a { font-size: 13px; }
  .logo { font-size: 15px; }

  /* Hero */
  .hero { padding: 56px 0 48px; }
  .hero h1 { font-size: 30px; letter-spacing: .5px; }
  .hero p.lead { font-size: 16px; margin-bottom: 26px; }
  .hero-actions { flex-wrap: wrap; }
  .hero-actions .btn { min-width: 150px; }

  /* 统计卡：三列在窄屏会挤爆，改为单列横排 */
  .hero-stats { grid-template-columns: 1fr; gap: 10px; margin-top: 30px; }
  .stat-card { display: flex; align-items: baseline; gap: 10px; padding: 13px 16px; }
  .stat-card .num { font-size: 21px; }
  .stat-card .label { margin-top: 0; }

  /* 区块与卡片 */
  .section { padding: 52px 0; }
  .section-head { margin-bottom: 30px; }
  .section-head h2 { font-size: 25px; }
  .product-card, .work-card, .price-card { padding: 22px 20px; }

  /* 四线指标卡 */
  .fl-demo { padding: 18px; }
  .fl-grid { grid-template-columns: 1fr; gap: 10px; }
  .fl-item { padding: 13px 14px; display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
  .fl-label { margin-bottom: 0; }
  .fl-val { font-size: 22px; }
  .fl-sub { margin-top: 0; text-align: right; }

  /* 页脚单列 */
  .footer-inner { flex-direction: column; gap: 22px; }

  /* 侧边栏更窄 */
  .sidebar { width: 60px; padding: 16px 8px; }

  /* 表格与小字 */
  table { font-size: 13px; }
}

@media (max-width: 480px) {
  .container { padding: 0 15px; }
  .hero h1 { font-size: 27px; }
  .section-head h2 { font-size: 22px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; max-width: 320px; margin: 0 auto; }

  /* 导航降级：隐藏次要链接，保留订阅方案与工作台 */
  .nav-links a[href="index.html#products"],
  .nav-links a[href="collab.html"] { display: none; }
  .nav-actions .btn { padding: 6px 12px; font-size: 13px; }

  /* 背景光斑缩小，避免小屏过于拥挤 */
  .bg-deco i:nth-child(1) { width: 260px; height: 260px; }
  .bg-deco i:nth-child(2) { width: 240px; height: 240px; }
  .bg-deco i:nth-child(3) { width: 320px; height: 320px; }
}

@media (max-width: 400px) {
  .nav-links a[href="pricing.html"] { display: none; }
  .hero h1 { font-size: 24px; }
  .fl-item { flex-direction: column; align-items: flex-start; gap: 4px; }
  .fl-sub { text-align: left; }
}

/* ============================================================
   细节统一 v1.1 —— 表单校验、可访问性、交互反馈、空状态
   ============================================================ */

/* 表单校验态 */
.field-error input { border-color: var(--zj-danger); }
.field-error input:focus { box-shadow: 0 0 0 3px rgba(192,57,43,.12); }
.field-tip { font-size: 12px; color: var(--zj-danger); margin-top: 6px; }

/* 键盘可达性：统一聚焦环（鼠标点击不显示，键盘 Tab 显示） */
a:focus-visible, button:focus-visible, input:focus-visible,
textarea:focus-visible, .tab:focus-visible {
  outline: 2px solid var(--zj-blue);
  outline-offset: 2px;
  border-radius: var(--zj-radius-sm);
}

/* 按下反馈 */
.btn:active { transform: translateY(1px); }
.tab { user-select: none; }

/* 定价卡与统计卡的悬停反馈（原来缺失） */
.price-card { transition: box-shadow .2s ease, transform .2s ease, border-color .2s ease; }
.price-card:hover { box-shadow: var(--zj-shadow-lg); transform: translateY(-3px); border-color: var(--zj-line-2); }
.stat-card { transition: box-shadow .2s ease, border-color .2s ease; }
.stat-card:hover { box-shadow: var(--zj-shadow); border-color: var(--zj-line-2); }

/* 标签与示例词条 */
.example-chip { transition: border-color .15s ease, color .15s ease; }
.example-chip:hover { border-color: var(--zj-line-2); color: var(--zj-text); }

/* 空状态 */
.empty {
  padding: 32px 20px; text-align: center; color: var(--zj-text-3); font-size: 14px;
}
.empty .e-icon { margin: 0 auto 12px; width: 40px; height: 40px; color: var(--zj-line-2); }
.empty .e-title { color: var(--zj-text-2); font-size: 15px; margin-bottom: 6px; }

/* 尊重系统的"减少动效"设置 */
@media (prefers-reduced-motion: reduce) {
  * { transition-duration: .01ms !important; animation-duration: .01ms !important; }
  .product-card:hover, .work-card:hover, .price-card:hover { transform: none; }
}

/* ============================================================
   磨玻璃质感 v1.2 —— 背景装饰 + 玻璃层 + 视觉组件 + 动效
   ============================================================ */

/* 全局微妙底色：让磨玻璃卡片在任何页面都能"浮"起来 */
body {
  background-color: var(--zj-bg);
  background-image:
    radial-gradient(circle at 12% 8%,  rgba(43,90,140,.07), transparent 42%),
    radial-gradient(circle at 88% 26%, rgba(185,138,47,.06), transparent 38%),
    radial-gradient(circle at 50% 92%, rgba(30,126,92,.05), transparent 45%);
  background-attachment: fixed;
}

/* 大理石纹路：SVG 分形噪声生成，零外部资源，平铺覆盖全部页面
   调整浓淡只需改 --zj-marble-opacity（默认 .5） */
:root { --zj-marble-opacity: .5; }

body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: var(--zj-marble-opacity);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='720' height='720'%3E%3Cfilter id='mb' x='0' y='0' width='100%25' height='100%25'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.009 0.014' numOctaves='5' seed='11'/%3E%3CfeColorMatrix type='matrix' values='0 0 0 0 0.36 0 0 0 0 0.44 0 0 0 0 0.56 0 0 0 0.40 0'/%3E%3C/filter%3E%3Crect width='720' height='720' filter='url(%23mb)'/%3E%3C/svg%3E");
  background-size: 720px 720px;
}

/* 工作台与对话页的外壳也需抬到纹路之上 */
.app-shell, .chat-shell { position: relative; z-index: 1; }

/* 背景光斑：为磨玻璃提供可折射的内容 */
.bg-deco { position: fixed; inset: 0; pointer-events: none; z-index: 0; overflow: hidden; }
.bg-deco i {
  position: absolute; display: block; border-radius: 50%; filter: blur(60px); opacity: .5;
}
.bg-deco i:nth-child(1) { width: 420px; height: 420px; top: -120px; left: -80px;
  background: radial-gradient(circle, rgba(43,90,140,.30), transparent 70%); }
.bg-deco i:nth-child(2) { width: 380px; height: 380px; top: 40px; right: -100px;
  background: radial-gradient(circle, rgba(185,138,47,.26), transparent 70%); }
.bg-deco i:nth-child(3) { width: 520px; height: 520px; bottom: -180px; left: 30%;
  background: radial-gradient(circle, rgba(30,126,92,.16), transparent 70%); }

/* 页面内容置于装饰之上 */
.nav, .hero, .section, .footer, .auth-wrap { position: relative; z-index: 1; }

/* 玻璃基元 */
.glass {
  background: rgba(255,255,255,.72);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border: 1px solid rgba(255,255,255,.65);
  box-shadow: 0 8px 30px rgba(22,40,60,.08);
}
.glass-soft {
  background: rgba(255,255,255,.58);
  backdrop-filter: blur(10px) saturate(150%);
  -webkit-backdrop-filter: blur(10px) saturate(150%);
  border: 1px solid rgba(255,255,255,.55);
  box-shadow: 0 6px 22px rgba(22,40,60,.07);
}

/* 导航：磨玻璃吸顶 */
.nav { background: rgba(255,255,255,.78) !important;
  backdrop-filter: blur(16px) saturate(170%);
  -webkit-backdrop-filter: blur(16px) saturate(170%);
  border-bottom: 1px solid rgba(255,255,255,.6); }

/* 卡片升级为轻玻璃（保留可读性） */
.product-card, .price-card, .stat-card, .panel {
  background: rgba(255,255,255,.76);
  backdrop-filter: blur(10px) saturate(150%);
  -webkit-backdrop-filter: blur(10px) saturate(150%);
  border: 1px solid rgba(255,255,255,.7);
}
.product-card:hover, .price-card:hover { background: rgba(255,255,255,.9); }

/* ---------- Hero 两列 + 产品示意 ---------- */
.hero-inner {
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 40px; align-items: center;
}
.hero-visual {
  border-radius: var(--zj-radius-lg); overflow: hidden; padding: 0;
}
.hv-top {
  display: flex; align-items: center; gap: 7px; padding: 12px 16px;
  border-bottom: 1px solid rgba(22,40,60,.07); background: rgba(255,255,255,.5);
}
.hv-top .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--zj-line-2); }
.hv-top .dot:nth-child(1) { background: #E0B4A8; }
.hv-top .dot:nth-child(2) { background: #D9C89A; }
.hv-top .dot:nth-child(3) { background: #A9C4B0; }
.hv-title { margin-left: 6px; font-size: 12.5px; color: var(--zj-text-2); }
.hv-body { padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.hv-msg { max-width: 88%; padding: 10px 14px; border-radius: 12px; font-size: 13px; line-height: 1.65; }
.hv-msg.user {
  align-self: flex-end; background: var(--zj-ink); color: #fff;
  border-bottom-right-radius: 4px;
}
.hv-msg.bot {
  align-self: flex-start; background: rgba(246,248,250,.9); color: var(--zj-text);
  border: 1px solid var(--zj-line); border-bottom-left-radius: 4px;
}
.hv-msg.bot b { color: var(--zj-ink); font-weight: 500; }
.hv-meta { font-size: 11.5px; color: var(--zj-text-3); margin-top: 6px; }
.hv-input {
  margin: 0 16px 16px; padding: 10px 14px; border-radius: 999px; font-size: 12.5px;
  color: var(--zj-text-3); background: rgba(246,248,250,.8); border: 1px solid var(--zj-line);
  display: flex; align-items: center; justify-content: space-between;
}
.hv-caret { width: 2px; height: 13px; background: var(--zj-blue); display: inline-block;
  animation: caret 1s step-end infinite; }
@keyframes caret { 50% { opacity: 0; } }

@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 28px; }
  .hero-visual { max-width: 520px; }
}

/* ---------- 四线结果可视化 ---------- */
.fl-demo { border-radius: var(--zj-radius-lg); padding: 24px 26px; margin-top: 20px; }
.fl-head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 12px;
  flex-wrap: wrap; margin-bottom: 18px;
}
.fl-head h4 { font-size: 15.5px; font-weight: 500; color: var(--zj-ink); }
.fl-head span { font-size: 12.5px; color: var(--zj-text-3); }
.fl-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.fl-item {
  background: rgba(255,255,255,.66); border: 1px solid rgba(255,255,255,.8);
  border-radius: var(--zj-radius); padding: 16px 14px;
}
.fl-label { font-size: 12.5px; color: var(--zj-text-2); margin-bottom: 8px; }
.fl-val { font-size: 25px; font-weight: 500; color: var(--zj-ink); line-height: 1.2; }
.fl-val span { font-size: 12.5px; font-weight: 400; color: var(--zj-text-3); margin-left: 3px; }
.fl-val.ok { color: var(--zj-success); }
.fl-val.warn { color: var(--zj-gold); }
.fl-sub { font-size: 11.5px; color: var(--zj-text-3); margin-top: 6px; }
.fl-note {
  margin-top: 16px; padding-top: 14px; border-top: 1px dashed var(--zj-line-2);
  font-size: 12px; color: var(--zj-text-2); line-height: 1.7;
}
.fl-note code {
  font-size: 11.5px; background: rgba(43,90,140,.08); color: var(--zj-blue);
  padding: 1px 6px; border-radius: 5px;
}
@media (max-width: 860px) { .fl-grid { grid-template-columns: repeat(2, 1fr); } }

/* ============================================================
   质感四件套 v1.3 —— 光泽扫过 · 微交互 · 顶部高光 · 数字等宽
   ============================================================ */

/* 伪元素定位基准（确保高光与光泽落在卡片内） */
.product-card, .price-card, .work-card, .fl-demo { position: relative; }

/* ① 光泽扫过：悬停时一道高光斜掠而过 */
.product-card, .price-card, .work-card { overflow: hidden; }
.product-card::after, .price-card::after, .work-card::after {
  content: '';
  position: absolute; top: 0; left: -130%;
  width: 55%; height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255,255,255,.6), transparent);
  transform: skewX(-18deg);
  transition: left .7s cubic-bezier(.25,.8,.35,1);
  pointer-events: none; z-index: 1;
}
.product-card:hover::after, .price-card:hover::after, .work-card:hover::after { left: 150%; }

/* ③ 顶部高光边：玻璃切割面的反光 */
.product-card::before, .price-card::before, .fl-demo::before {
  content: '';
  position: absolute; top: 0; left: 12%; right: 12%; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.95), transparent);
  z-index: 2; pointer-events: none;
}

/* ② 微交互：按钮涟漪 */
.btn { position: relative; overflow: hidden; }
.btn::before {
  content: '';
  position: absolute; top: 50%; left: 50%;
  width: 0; height: 0; border-radius: 50%;
  background: rgba(255,255,255,.3);
  transform: translate(-50%, -50%);
  transition: width .45s ease, height .45s ease, opacity .5s ease;
  opacity: .9; pointer-events: none;
}
.btn:active::before { width: 260px; height: 260px; opacity: 0; }

/* ② 微交互：箭头右移、图标轻抬、标签微亮 */
.p-link svg, .wc-go svg { transition: transform .22s cubic-bezier(.22,.61,.36,1); }
.p-link:hover svg { transform: translateX(4px); }
.work-card:hover .wc-go svg { transform: translateX(4px); }
.p-icon { transition: transform .28s cubic-bezier(.22,.61,.36,1); }
.product-card:hover .p-icon { transform: translateY(-3px); }
.tag, .example-chip { transition: background-color .2s ease, border-color .2s ease; }
.product-card:hover .tag { background: rgba(43,90,140,.12); }

/* ④ 数字等宽：统计与指标数字排列整齐、滚动时不跳动 */
.num, .cnt, .fl-val, .bar-fill, .kv b { font-variant-numeric: tabular-nums; }

/* ⑤ 阴影分层：不同层级用不同深度（补充原有两档） */
:root {
  --zj-shadow-xs: 0 1px 2px rgba(22,40,60,.05);
  --zj-shadow-md: 0 2px 10px rgba(22,40,60,.08);
  --zj-shadow-xl: 0 18px 44px rgba(22,40,60,.14);
}
.panel, .fl-item { box-shadow: var(--zj-shadow-xs); }
.overlay .modal { box-shadow: var(--zj-shadow-xl); }

/* 减少动效偏好下关闭光泽与涟漪 */
@media (prefers-reduced-motion: reduce) {
  .product-card::after, .price-card::after, .work-card::after { display: none; }
  .btn::before { display: none; }
}

/* ---------- 滚动淡入 ---------- */
.reveal { opacity: 0; transform: translateY(20px); }
.reveal.in {
  opacity: 1; transform: none;
  transition: opacity .65s cubic-bezier(.22,.61,.36,1), transform .65s cubic-bezier(.22,.61,.36,1);
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}