/* ==========================================================
   老徐做报表 · 个人主页
   纯手写 CSS，无框架。移动优先，逐级放大。
   配色：深蓝主色 + 米白底 + 橙色强调（与头像一致）
   ========================================================== */

:root{
  --ink:        #1e3050;   /* 主色 深蓝 */
  --ink-soft:   #3d5476;
  --accent:     #d66a3e;   /* 强调 橙 */
  --accent-dk:  #b8552c;
  --bg:         #ffffff;
  --bg-alt:     #f5f3ee;   /* 米白 */
  --bg-deep:    #1a2b4a;
  --text:       #23262c;
  --text-mute:  #666d7a;
  --line:       #dfe3ea;
  --ok:         #1f7a4d;
  --err:        #b3261e;
  --radius:     14px;
  --radius-sm:  9px;
  --shadow:     0 2px 10px rgba(30,48,80,.07);
  --shadow-lg:  0 10px 34px rgba(30,48,80,.13);
  --wrap:       1120px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
          "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
}

*,*::before,*::after{ box-sizing:border-box; }

html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:.01ms !important; transition-duration:.01ms !important; }
}

body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}

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

h1,h2,h3{ line-height:1.3; color:var(--ink); margin:0 0 .6em; font-weight:700; }
h1{ font-size:clamp(1.75rem, 5vw, 3rem); letter-spacing:-.01em; }
h2{ font-size:clamp(1.4rem, 3.4vw, 2.1rem); }
h3{ font-size:1.1rem; }
p{ margin:0 0 1em; }

a{ color:var(--ink); text-decoration:none; }
a:hover{ color:var(--accent-dk); }

/* 键盘焦点：必须清晰可见 */
a:focus-visible,button:focus-visible,input:focus-visible,
select:focus-visible,textarea:focus-visible{
  outline:3px solid var(--accent);
  outline-offset:2px;
  border-radius:4px;
}

.wrap{ width:100%; max-width:var(--wrap); margin:0 auto; padding:0 20px; }

.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;
}

.skip-link{
  position:absolute; left:-9999px; top:0; z-index:200;
  background:var(--ink); color:#fff; padding:12px 18px; border-radius:0 0 8px 0;
}
.skip-link:focus{ left:0; color:#fff; }

/* ================= 顶部导航 ================= */
.site-header{
  position:sticky; top:0; z-index:100;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(1.6) blur(10px);
  border-bottom:1px solid var(--line);
}
.nav{
  max-width:var(--wrap); margin:0 auto; padding:12px 20px;
  display:flex; align-items:center; gap:16px; flex-wrap:wrap;
}
.brand{
  display:flex; align-items:center; gap:10px;
  font-weight:700; font-size:1.05rem; color:var(--ink); margin-right:auto;
}
.brand img{ border-radius:8px; }

.nav-toggle{
  display:inline-flex; align-items:center; justify-content:center;
  width:42px; height:42px; padding:0;
  background:transparent; border:1px solid var(--line);
  border-radius:var(--radius-sm); cursor:pointer;
}
.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after{
  content:""; display:block; width:20px; height:2px;
  background:var(--ink); border-radius:2px; position:relative;
}
.nav-toggle-bar::before{ position:absolute; top:-6px; }
.nav-toggle-bar::after{ position:absolute; top:6px; }

.nav-links{
  list-style:none; margin:0; padding:0;
  display:none; width:100%; flex-direction:column; gap:2px;
}
.nav-links.open{ display:flex; padding-top:10px; }
.nav-links a{
  display:block; padding:11px 12px; border-radius:var(--radius-sm);
  color:var(--ink-soft); font-size:.97rem;
}
.nav-links a:hover{ background:var(--bg-alt); color:var(--ink); }
.nav-cta{
  background:var(--ink); color:#fff !important; text-align:center; font-weight:600;
}
.nav-cta:hover{ background:var(--bg-deep); }

@media (min-width:860px){
  .nav-toggle{ display:none; }
  .nav-links{
    display:flex; flex-direction:row; width:auto; align-items:center; gap:6px;
  }
  .nav-links a{ padding:9px 14px; }
}

/* ================= 按钮 ================= */
.btn{
  display:inline-block; padding:14px 26px; border:1px solid transparent;
  border-radius:var(--radius-sm); font-size:1rem; font-weight:600;
  cursor:pointer; text-align:center; font-family:inherit;
  transition:background .18s, color .18s, transform .18s;
}
.btn-primary{ background:var(--accent); color:#fff; }
.btn-primary:hover{ background:var(--accent-dk); color:#fff; transform:translateY(-1px); }
.btn-ghost{ background:transparent; color:var(--ink); border-color:var(--line); }
.btn-ghost:hover{ background:var(--bg-alt); }
.btn-sm{ padding:8px 14px; font-size:.88rem; }

/* ================= 首屏 ================= */
.hero{
  background:linear-gradient(168deg,#1a2b4a 0%,#25406b 58%,#2d4d7f 100%);
  color:#fff; padding:64px 0 72px;
}
.hero h1{ color:#fff; margin-bottom:.5em; }
.eyebrow{
  text-transform:uppercase; letter-spacing:.14em; font-size:.76rem;
  color:#9ab4dd; margin:0 0 14px; font-weight:600;
}
.lead{ font-size:1.08rem; color:#d5e0f0; max-width:62ch; }

.hero-actions{ display:flex; flex-wrap:wrap; gap:12px; margin:30px 0 40px; }
.hero-actions .btn-ghost{ color:#fff; border-color:rgba(255,255,255,.4); }
.hero-actions .btn-ghost:hover{ background:rgba(255,255,255,.12); color:#fff; }

.hero-facts{
  list-style:none; margin:0; padding:26px 0 0; border-top:1px solid rgba(255,255,255,.18);
  display:grid; gap:20px; grid-template-columns:1fr;
}
.hero-facts strong{ display:block; font-size:1.3rem; color:#fff; }
.hero-facts span{ font-size:.9rem; color:#9ab4dd; }
@media (min-width:640px){ .hero-facts{ grid-template-columns:repeat(3,1fr); } }

/* ================= 通用区块 ================= */
.section{ padding:64px 0; }
.section-alt{ background:var(--bg-alt); }
.section-sub{ color:var(--text-mute); max-width:64ch; margin:-.2em 0 34px; }

/* ================= 能力卡片 ================= */
.cards{ display:grid; gap:18px; grid-template-columns:1fr; }
@media (min-width:700px){ .cards{ grid-template-columns:repeat(2,1fr); } }

.card{
  background:var(--bg); border:1px solid var(--line);
  border-radius:var(--radius); padding:26px; box-shadow:var(--shadow);
}
.card h3{ margin-bottom:.5em; }
.card h3::before{
  content:""; display:block; width:34px; height:3px;
  background:var(--accent); border-radius:2px; margin-bottom:12px;
}
.card p{ margin:0; color:var(--text-mute); font-size:.96rem; }

/* ================= 案例 ================= */
.case-steps{ list-style:none; margin:0; padding:0; display:grid; gap:34px; }
.case-steps > li{
  background:var(--bg); border:1px solid var(--line); border-radius:var(--radius);
  padding:24px; box-shadow:var(--shadow);
  display:grid; gap:20px; align-items:start; grid-template-columns:1fr;
}
@media (min-width:840px){
  .case-steps > li{ grid-template-columns:minmax(0,34%) minmax(0,66%); gap:28px; }
}
.case-text h3{ margin-bottom:.45em; }
.case-text p{ margin:0; color:var(--text-mute); font-size:.95rem; }

.case-fig{ margin:0; }
.case-fig img{
  width:100%; border:1px solid var(--line); border-radius:var(--radius-sm);
  background:#fff;
}
.case-fig figcaption{
  margin-top:9px; font-size:.83rem; color:var(--text-mute); text-align:center;
}

/* ================= 价格 ================= */
.plans{ display:grid; gap:20px; grid-template-columns:1fr; align-items:start; }
@media (min-width:820px){ .plans{ grid-template-columns:repeat(3,1fr); } }

.plan{
  position:relative; background:var(--bg); border:1px solid var(--line);
  border-radius:var(--radius); padding:28px 24px; box-shadow:var(--shadow);
}
.plan-featured{
  border-color:var(--accent); border-width:2px;
  box-shadow:var(--shadow-lg);
}
.plan-badge{
  position:absolute; top:-13px; left:24px;
  background:var(--accent); color:#fff; font-size:.75rem; font-weight:700;
  padding:4px 12px; border-radius:99px; margin:0;
}
.plan h3{ margin-bottom:.3em; }
.price{
  font-size:2.05rem; font-weight:800; color:var(--ink); margin:0 0 .6em;
  letter-spacing:-.02em;
}
.price span{ font-size:.95rem; font-weight:600; color:var(--text-mute); }
.plan ul{ margin:0 0 1em; padding-left:0; list-style:none; }
.plan li{
  position:relative; padding-left:22px; margin-bottom:8px;
  font-size:.94rem; color:var(--text-mute);
}
.plan li::before{
  content:""; position:absolute; left:4px; top:.62em;
  width:7px; height:7px; border-radius:50%; background:var(--accent);
}
.plan-note{ margin:0; font-size:.85rem; color:var(--text-mute); font-style:italic; }

.privacy-note{
  margin-top:32px; padding:24px; border-radius:var(--radius);
  background:var(--bg-alt); border:1px solid var(--line);
}
.section-alt .privacy-note{ background:var(--bg); }
.privacy-note h3{ margin-bottom:.5em; }
.privacy-note ul{ margin:0; padding-left:20px; }
.privacy-note li{ color:var(--text-mute); font-size:.94rem; margin-bottom:6px; }

/* ================= 关于 ================= */
.about-grid{ display:grid; gap:32px; grid-template-columns:1fr; }
@media (min-width:900px){
  .about-grid{ grid-template-columns:minmax(0,1.45fr) minmax(0,1fr); gap:48px; }
}
.about-grid p{ color:var(--text-mute); }
.about-boundary{
  padding:16px 18px; border-left:4px solid var(--accent);
  background:var(--bg); border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  font-size:.93rem;
}
.section-alt .about-boundary{ background:#fff; }
.about-boundary strong{ color:var(--ink); }

.about-side h3{ font-size:.95rem; margin-bottom:.8em; }
.about-side h3:not(:first-child){ margin-top:1.6em; }
.tags{ list-style:none; margin:0; padding:0; display:flex; flex-wrap:wrap; gap:8px; }
.tags li{
  background:var(--bg); border:1px solid var(--line);
  padding:6px 13px; border-radius:99px; font-size:.85rem; color:var(--ink-soft);
}
.section-alt .tags li{ background:#fff; }
.bullets{ margin:0; padding-left:20px; }
.bullets li{ color:var(--text-mute); font-size:.93rem; margin-bottom:7px; }

/* ================= 留资表单 ================= */
.contact-wrap{ max-width:660px; }
.lead-form{
  background:var(--bg); border:1px solid var(--line);
  border-radius:var(--radius); padding:28px; box-shadow:var(--shadow);
}
.field{ margin-bottom:20px; }
.field label{
  display:block; font-weight:600; font-size:.94rem;
  color:var(--ink); margin-bottom:7px;
}
.req{ color:var(--err); }
.opt{ font-weight:400; color:var(--text-mute); font-size:.86rem; }

.field input,.field select,.field textarea{
  width:100%; padding:12px 14px; font-family:inherit; font-size:1rem;
  color:var(--text); background:#fff;
  border:1px solid var(--line); border-radius:var(--radius-sm);
}
.field textarea{ resize:vertical; min-height:96px; }
.field input::placeholder,.field textarea::placeholder{ color:#a7adb9; }
.field input[aria-invalid="true"],.field textarea[aria-invalid="true"]{
  border-color:var(--err); background:#fff7f6;
}

.hint{ margin:6px 0 0; font-size:.82rem; color:var(--text-mute); }
.err{ margin:6px 0 0; font-size:.85rem; color:var(--err); font-weight:600; }

.honeypot{
  position:absolute; left:-9999px; width:1px; height:1px; overflow:hidden;
}

.btn-submit{ width:100%; }
@media (min-width:560px){ .btn-submit{ width:auto; min-width:190px; } }

.form-status{ margin:16px 0 0; font-size:.94rem; font-weight:600; }
.form-status.ok{ color:var(--ok); }
.form-status.bad{ color:var(--err); }

.backend-notice{
  margin-top:26px; padding:22px 24px;
  background:#fffaf2; border:1px solid #f0d9b8;
  border-left:4px solid #e0a147; border-radius:0 var(--radius) var(--radius) 0;
}
.backend-notice h3{ font-size:1rem; margin-bottom:.6em; color:#8a5a12; }
.backend-notice p{ margin:0 0 .7em; font-size:.92rem; color:#6b5a3c; }
.backend-notice p:last-child{ margin-bottom:0; }

/* ================= 页脚 ================= */
.site-footer{ background:var(--bg-deep); color:#c3d2e8; padding:44px 0 22px; margin-top:20px; }
.footer-inner{ display:grid; gap:26px; grid-template-columns:1fr; }
@media (min-width:760px){ .footer-inner{ grid-template-columns:repeat(3,1fr); } }
.footer-brand{ font-weight:700; color:#fff; font-size:1.05rem; margin:0 0 .2em; }
.footer-desc{ margin:0; font-size:.9rem; color:#8fa6c6; }
.footer-label{
  font-size:.78rem; text-transform:uppercase; letter-spacing:.1em;
  color:#8fa6c6; margin:0 0 .7em; font-weight:600;
}
.footer-links{ list-style:none; margin:0; padding:0; }
.footer-links li{ font-size:.93rem; margin-bottom:5px; }
.footer-fine{ margin:0; font-size:.84rem; color:#8fa6c6; }
.copyright{
  max-width:var(--wrap); margin:30px auto 0; padding:16px 20px 0;
  border-top:1px solid rgba(255,255,255,.13);
  font-size:.83rem; color:#7e94b4;
}

/* ================= 本地留资面板（仅本人用） ================= */
.admin-panel{
  position:fixed; right:16px; bottom:16px; z-index:150;
  width:min(430px, calc(100vw - 32px)); max-height:70vh; overflow:auto;
  background:#fff; border:1px solid var(--line); border-radius:var(--radius);
  box-shadow:var(--shadow-lg); padding:18px;
}
.admin-head{ display:flex; align-items:center; justify-content:space-between; gap:10px; }
.admin-x{
  background:transparent; border:1px solid var(--line); border-radius:6px;
  padding:4px 10px; cursor:pointer; font-family:inherit; font-size:.85rem;
}
.admin-hint{ font-size:.8rem; color:var(--text-mute); margin:8px 0 12px; }
.admin-list{ display:grid; gap:10px; }
.admin-item{
  border:1px solid var(--line); border-radius:var(--radius-sm);
  padding:11px 13px; font-size:.88rem;
}
.admin-item strong{ color:var(--ink); }
.admin-item .meta{ color:var(--text-mute); font-size:.8rem; }
.admin-empty{ color:var(--text-mute); font-size:.88rem; }
.admin-actions{ display:flex; gap:8px; margin-top:14px; }

@media print{
  .site-header,.hero-actions,.lead-form,.admin-panel,.nav-toggle{ display:none; }
  body{ color:#000; }
}