@charset "utf-8";
/* ==========================================================================
   壹佰叁捌建站 · 古风信封风 全站样式表
   仿古黄 + 深棕 + 暗红 ｜ 国民精品建站官网
   纯 HTML5 + CSS3，无框架依赖
   ========================================================================== */

/* ---------- 设计变量 ---------- */
:root {
    /* 主色：仿古黄系 */
    --paper:        #F3E6C4;   /* 信纸底色 */
    --paper-soft:   #F8EFD9;   /* 浅信纸 */
    --paper-deep:   #E8D2A0;   /* 深信纸 */
    --paper-edge:   #D8BC84;   /* 纸边折痕 */

    /* 墨色：深棕系 */
    --ink:          #2C2014;   /* 墨黑 */
    --ink-soft:     #4A3520;   /* 深棕 */
    --ink-mute:     #6E5638;   /* 暗棕 */
    --ink-line:     #B79A66;   /* 棕线 */

    /* 断点 */
    --bp-md: 1280px;   /* 中等屏：切换汉堡菜单的阈值 */

    /* 朱印：暗红系 */
    --seal:         #8E2A24;   /* 印泥红 */
    --seal-deep:    #6E1C18;   /* 深暗红 */
    --seal-soft:    #B23A33;   /* 浅印红 */
    --seal-tint:    #E7C9C0;   /* 红染 */

    /* 辅助 */
    --gold:         #B8893A;   /* 描金 */
    --string:       #8A6A3A;   /* 麻绳色 */

    /* 字体 */
    --f-kai:        "KaiTi","STKaiti","楷体","AR PL UKai CN","FangSong","仿宋",serif;
    --f-song:       "STSong","SimSun","宋体","Songti SC",serif;
    --f-hei:        "Microsoft YaHei","微软雅黑","PingFang SC","Hiragino Sans GB",sans-serif;

    /* 尺寸 */
    --w-max:        1240px;
    --nav-h:        74px;

    /* 阴影：纸面柔影 */
    --shadow-paper: 0 2px 6px rgba(74,53,32,.10), 0 10px 30px rgba(74,53,32,.08);
    --shadow-seal:  0 4px 14px rgba(110,28,24,.28);
}

/* ---------- 重置 ---------- */
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
    font-family: var(--f-song);
    color: var(--ink);
    line-height: 1.85;
    font-size: 16px;
    background-color: var(--paper);
    /* 信纸纹理：细横格 + 暗角 */
    background-image:
        repeating-linear-gradient(0deg, rgba(183,154,102,.10) 0 1px, transparent 1px 38px),
        radial-gradient(120% 90% at 50% 0%, rgba(248,239,217,.7) 0%, transparent 55%),
        radial-gradient(140% 120% at 50% 100%, rgba(216,188,132,.35) 0%, transparent 60%);
    background-attachment: fixed;
    overflow-x: hidden;
}
img { max-width: 100%; display: block; border: 0; }
a { color: var(--seal-deep); text-decoration: none; transition: color .25s ease; }
a:hover { color: var(--seal); }
ul,ol { list-style: none; }
h1,h2,h3,h4 { font-family: var(--f-kai); font-weight: 700; line-height: 1.35; color: var(--ink); }
h1 { font-size: clamp(1.9rem, 4vw, 3rem); }
h2 { font-size: clamp(1.55rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
h4 { font-size: clamp(1.05rem, 1.6vw, 1.2rem); }
p  { color: var(--ink-soft); }

/* 通用容器 */
.wrap { width: 92%; max-width: var(--w-max); margin: 0 auto; }
.wrap-narrow { width: 90%; max-width: 880px; margin: 0 auto; }

/* ==========================================================================
   导航：信封邮带样式（非通用顶栏）
   ========================================================================== */
.site-head {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    height: var(--nav-h);
    background: linear-gradient(180deg, rgba(243,230,196,.97), rgba(232,210,160,.94));
    border-bottom: 1px solid rgba(110,86,56,.28);
    box-shadow: 0 1px 0 rgba(255,255,255,.4) inset, 0 4px 18px rgba(74,53,32,.10);
    transition: background .3s ease, box-shadow .3s ease, border-color .3s ease;
}
/* 滚动后加深 */
.site-head.scrolled {
    background: linear-gradient(180deg, rgba(61,40,23,.96), rgba(74,53,32,.96));
    border-bottom-color: var(--seal-deep);
    box-shadow: 0 6px 22px rgba(44,32,20,.30);
}
.site-head.scrolled .nav-brand .brand-txt b,
.site-head.scrolled .nav-brand .brand-txt span,
.site-head.scrolled .nav-menu a,
.site-head.scrolled .nav-cta { color: var(--paper-soft); }
.site-head.scrolled .nav-menu a::after { background: var(--seal-soft); }
.site-head.scrolled .nav-cta { border-color: var(--seal-soft); }

.nav-inner {
    height: 100%; max-width: var(--w-max); margin: 0 auto;
    padding: 0 2.2vw;
    display: flex; align-items: center; justify-content: space-between;
    gap: 14px;
}
.nav-brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-seal {
    width: 42px; height: 42px; border-radius: 8px;
    background: var(--seal);
    display: grid; place-items: center;
    color: var(--paper-soft); font-family: var(--f-kai); font-weight: 700;
    font-size: .98rem; line-height: 1.1; text-align: center;
    box-shadow: var(--shadow-seal), inset 0 0 0 2px rgba(248,239,217,.35);
    transform: rotate(-4deg);
    letter-spacing: 1px;
}
.brand-txt b { display: block; font-family: var(--f-kai); font-size: 1.10rem; color: var(--ink); letter-spacing: 1.5px; }
.brand-txt span { display: block; font-size: .62rem; letter-spacing: 3px; color: var(--ink-mute); text-transform: uppercase; }
.site-head.scrolled .brand-txt span { color: var(--paper-edge); }

.nav-menu { display: flex; align-items: center; gap: 2px; flex-wrap: nowrap; white-space: nowrap; }
.nav-menu > li { flex-shrink: 0; }
.nav-menu > li > a {
    position: relative; display: block; padding: 8px 11px;
    font-family: var(--f-kai); font-size: 1rem; color: var(--ink-soft); letter-spacing: .5px;
}
.nav-menu > li > a::after {
    content: ""; position: absolute; left: 11px; right: 11px; bottom: 4px; height: 2px;
    background: var(--seal); transform: scaleX(0); transform-origin: left; transition: transform .28s ease;
}
.nav-menu > li > a:hover::after,
.nav-menu > li.active > a::after { transform: scaleX(1); }
.nav-menu > li > a:hover { color: var(--seal); }
/* 下拉 */
.nav-menu .has-sub { position: relative; }
.nav-sub {
    position: absolute; top: 100%; left: 50%; transform: translateX(-50%) translateY(8px);
    min-width: 170px; padding: 8px;
    background: var(--paper-soft); border: 1px solid var(--ink-line);
    border-radius: 6px; box-shadow: var(--shadow-paper);
    opacity: 0; visibility: hidden; transition: all .25s ease;
}
.nav-menu .has-sub:hover .nav-sub { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.nav-sub a { display: block; padding: 7px 12px; font-size: .88rem; border-radius: 4px; color: var(--ink-soft); white-space: nowrap; }
.nav-sub a:hover { background: var(--paper-deep); color: var(--seal-deep); }

.nav-cta {
    padding: 7px 18px; border: 1.5px solid var(--seal); border-radius: 30px;
    font-family: var(--f-kai); color: var(--seal-deep); font-size: .94rem; letter-spacing: 1px;
    transition: all .25s ease;
    flex-shrink: 0;
}
.nav-cta:hover { background: var(--seal); color: var(--paper-soft) !important; }

/* 汉堡 */
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 6px; cursor: pointer; background: none; border: 0; }
.nav-toggle span { width: 26px; height: 2px; background: var(--ink-soft); transition: all .3s ease; border-radius: 2px; }
.site-head.scrolled .nav-toggle span { background: var(--paper-soft); }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   页脚：信封封口 + 邮戳
   ========================================================================== */
.site-foot {
    position: relative; margin-top: 60px;
    background: linear-gradient(180deg, var(--paper-deep) 0%, #D9BD80 100%);
    border-top: 3px double var(--ink-mute);
    padding: 64px 0 0;
    overflow: hidden;
}
/* 顶部折痕装饰 */
.site-foot::before {
    content: ""; position: absolute; top: 0; left: 0; right: 0; height: 14px;
    background: repeating-linear-gradient(90deg, var(--ink-mute) 0 2px, transparent 2px 14px);
    opacity: .35;
}
.foot-grid {
    display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px;
    padding-bottom: 44px;
}
.foot-brand .brand-seal { width: 56px; height: 56px; font-size: 1.2rem; margin-bottom: 14px; }
.foot-brand p { font-size: .9rem; color: var(--ink-soft); line-height: 1.9; }
.foot-col h4 { font-size: 1.08rem; color: var(--seal-deep); margin-bottom: 16px; position: relative; padding-left: 14px; }
.foot-col h4::before { content: ""; position: absolute; left: 0; top: 6px; width: 4px; height: 18px; background: var(--seal); border-radius: 2px; }
.foot-col li { margin-bottom: 9px; }
.foot-col a { color: var(--ink-soft); font-size: .9rem; }
.foot-col a:hover { color: var(--seal); padding-left: 4px; }
.foot-contact li { font-size: .9rem; color: var(--ink-soft); margin-bottom: 10px; display: flex; gap: 8px; align-items: flex-start; }
.foot-contact .ci { color: var(--seal); font-family: var(--f-kai); flex-shrink: 0; }
.foot-bar {
    border-top: 1px solid rgba(110,86,56,.3);
    padding: 18px 0; text-align: center;
    font-size: .82rem; color: var(--ink-mute); letter-spacing: .5px;
}
.foot-bar a { color: var(--ink-mute); }
.foot-bar a:hover { color: var(--seal); }
/* 邮戳圆章 */
.foot-postmark {
    position: absolute; right: 5%; top: 36px;
    width: 130px; height: 130px; border-radius: 50%;
    border: 2px solid var(--seal); opacity: .5;
    display: grid; place-items: center; text-align: center;
    transform: rotate(-12deg); pointer-events: none;
}
.foot-postmark::before {
    content: ""; position: absolute; inset: 8px; border: 1px dashed var(--seal); border-radius: 50%;
}
.foot-postmark span { font-family: var(--f-kai); color: var(--seal); font-size: .82rem; line-height: 1.5; }

/* ==========================================================================
   通用区块 / 标题
   ========================================================================== */
.section { padding: 72px 0; position: relative; }
.section-tight { padding: 48px 0; position: relative; }
.sec-head { text-align: center; margin-bottom: 46px; position: relative; }
.sec-eyebrow {
    display: inline-block; font-family: var(--f-kai); color: var(--seal);
    letter-spacing: 6px; font-size: .86rem; margin-bottom: 10px;
}
.sec-eyebrow::before, .sec-eyebrow::after { content: "—"; margin: 0 8px; color: var(--ink-line); }
.sec-title { position: relative; display: inline-block; padding: 0 30px; }
.sec-title::before, .sec-title::after {
    content: "❖"; color: var(--seal); font-size: .9rem; position: absolute; top: 50%; transform: translateY(-50%); opacity: .7;
}
.sec-title::before { left: 0; }
.sec-title::after { right: 0; }
.sec-desc { max-width: 640px; margin: 14px auto 0; color: var(--ink-mute); font-size: .96rem; }

/* 信封分割折痕 */
.fold-line {
    height: 2px; margin: 0 auto; max-width: var(--w-max);
    background: repeating-linear-gradient(90deg, var(--ink-line) 0 8px, transparent 8px 18px);
    opacity: .5; position: relative;
}
.fold-line::before, .fold-line::after {
    content: ""; position: absolute; top: 50%; transform: translateY(-50%);
    width: 10px; height: 10px; border-radius: 50%; background: var(--seal); opacity: .6;
}
.fold-line::before { left: 6%; }
.fold-line::after { right: 6%; }

/* ==========================================================================
   按钮：蜡封 / 描金
   ========================================================================== */
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 12px 30px; border-radius: 30px; font-family: var(--f-kai);
    font-size: 1rem; letter-spacing: 2px; cursor: pointer; border: 0;
    transition: all .28s ease; position: relative; overflow: hidden;
}
.btn-seal { background: var(--seal); color: var(--paper-soft); box-shadow: var(--shadow-seal); }
.btn-seal:hover { background: var(--seal-deep); color: #fff; transform: translateY(-2px); }
.btn-line { background: transparent; color: var(--seal-deep); border: 1.5px solid var(--seal); }
.btn-line:hover { background: var(--seal); color: var(--paper-soft); }
.btn-ink { background: var(--ink-soft); color: var(--paper-soft); }
.btn-ink:hover { background: var(--ink); transform: translateY(-2px); }
.btn-sm { padding: 8px 20px; font-size: .9rem; }

/* ==========================================================================
   信纸卡片
   ========================================================================== */
.letter-card {
    position: relative; background: var(--paper-soft);
    border: 1px solid var(--ink-line); border-radius: 4px;
    padding: 30px; box-shadow: var(--shadow-paper);
    transition: transform .3s ease, box-shadow .3s ease;
}
.letter-card::before {
    content: ""; position: absolute; top: 0; left: 0; right: 0; height: 6px;
    background: linear-gradient(90deg, var(--seal) 0%, var(--seal) 30%, var(--paper-edge) 30%, var(--paper-edge) 100%);
}
.letter-card:hover { transform: translateY(-6px); box-shadow: 0 6px 14px rgba(74,53,32,.14), 0 18px 44px rgba(74,53,32,.12); }
.lc-num {
    font-family: var(--f-kai); color: var(--seal); font-size: 2.2rem; line-height: 1;
    opacity: .85; margin-bottom: 8px;
}
.letter-card h3 { margin-bottom: 10px; color: var(--ink); }
.letter-card p { font-size: .92rem; }

/* 小标签 */
.tag {
    display: inline-block; padding: 3px 12px; font-size: .78rem;
    background: var(--paper-deep); color: var(--seal-deep); border-radius: 20px;
    border: 1px solid var(--ink-line); font-family: var(--f-kai); letter-spacing: 1px;
}
.tag-seal { background: var(--seal); color: var(--paper-soft); border-color: var(--seal-deep); }

/* ==========================================================================
   首页 Hero：邮戳印章构图（非通用 banner）
   ========================================================================== */
.hero {
    position: relative; min-height: 100vh; padding-top: var(--nav-h);
    display: flex; align-items: center; overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; opacity: .22; filter: sepia(.5); }
.hero-bg::after {
    content: ""; position: absolute; inset: 0;
    background: radial-gradient(80% 70% at 30% 40%, rgba(243,230,196,.4), transparent 70%),
                linear-gradient(110deg, var(--paper) 30%, transparent 65%);
}
.hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.25fr .9fr; gap: 40px; align-items: center; width: 100%; }
.hero-copy { position: relative; }
.hero-eyebrow {
    display: inline-flex; align-items: center; gap: 10px;
    font-family: var(--f-kai); color: var(--seal); letter-spacing: 4px; margin-bottom: 22px;
}
.hero-eyebrow::before { content: ""; width: 38px; height: 2px; background: var(--seal); }
.hero h1 { margin-bottom: 22px; }
.hero h1 .accent { color: var(--seal); }
.hero-lead { font-size: 1.05rem; color: var(--ink-soft); max-width: 520px; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* Hero 右侧：印章组合 */
.hero-stamp {
    position: relative; height: 460px;
    display: flex; align-items: center; justify-content: center;
}
.stamp-main {
    width: 280px; height: 280px; border-radius: 50%;
    background: radial-gradient(circle at 35% 30%, var(--seal-soft), var(--seal) 60%, var(--seal-deep));
    color: var(--paper-soft); display: grid; place-items: center; text-align: center;
    box-shadow: var(--shadow-seal), inset 0 0 0 4px rgba(248,239,217,.3);
    transform: rotate(-6deg); position: relative;
}
.stamp-main::before { content: ""; position: absolute; inset: 12px; border: 2px dashed rgba(248,239,217,.45); border-radius: 50%; }
.stamp-main b { font-family: var(--f-kai); font-size: 2.4rem; line-height: 1.15; letter-spacing: 4px; }
.stamp-main span { font-size: .8rem; letter-spacing: 3px; margin-top: 6px; }
.stamp-float {
    position: absolute; padding: 14px 20px; background: var(--paper-soft);
    border: 1px solid var(--ink-line); border-radius: 8px; box-shadow: var(--shadow-paper);
    font-family: var(--f-kai); font-size: .92rem; color: var(--ink-soft);
}
.stamp-float.s1 { top: 8%; left: 0; transform: rotate(-5deg); }
.stamp-float.s2 { bottom: 10%; right: 4%; transform: rotate(4deg); }
.stamp-float.s3 { top: 38%; right: -10px; transform: rotate(-3deg); background: var(--ink-soft); color: var(--paper-soft); border-color: var(--ink); }
.stamp-float b { color: var(--seal); }
.stamp-float.s3 b { color: var(--seal-soft); }

/* 首屏统计条 */
.hero-stats {
    display: grid; grid-template-columns: repeat(4,1fr); gap: 0;
    background: var(--paper-soft); border-top: 1px solid var(--ink-line); border-bottom: 1px solid var(--ink-line);
}
.hero-stat { text-align: center; padding: 26px 12px; border-right: 1px dashed var(--ink-line); }
.hero-stat:last-child { border-right: 0; }
.hero-stat b { display: block; font-family: var(--f-kai); font-size: 2rem; color: var(--seal); }
.hero-stat span { font-size: .84rem; color: var(--ink-mute); letter-spacing: 1px; }

/* ==========================================================================
   业务卡片网格（错落，非通用三列）
   ========================================================================== */
.service-grid {
    display: grid; grid-template-columns: repeat(3,1fr); gap: 26px;
}
.svc-card {
    position: relative; background: var(--paper-soft); border: 1px solid var(--ink-line);
    border-radius: 6px; overflow: hidden; box-shadow: var(--shadow-paper);
    transition: transform .3s ease, box-shadow .3s ease;
}
.svc-card:nth-child(2) { transform: translateY(24px); }
.svc-card:nth-child(5) { transform: translateY(24px); }
.svc-card:hover { transform: translateY(-6px); box-shadow: 0 8px 18px rgba(74,53,32,.16), 0 22px 50px rgba(74,53,32,.12); }
.svc-card:nth-child(2):hover, .svc-card:nth-child(5):hover { transform: translateY(18px); }
.svc-img { height: 180px; overflow: hidden; position: relative; }
.svc-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; filter: sepia(.15); }
.svc-card:hover .svc-img img { transform: scale(1.06); }
.svc-img::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 60%, rgba(61,40,23,.45)); }
.svc-body { padding: 22px 22px 26px; }
.svc-body h3 { margin-bottom: 8px; }
.svc-body p { font-size: .9rem; margin-bottom: 14px; }
.svc-more { font-family: var(--f-kai); color: var(--seal); font-size: .9rem; display: inline-flex; align-items: center; gap: 4px; }
.svc-more::after { content: "›"; transition: transform .25s ease; }
.svc-more:hover::after { transform: translateX(4px); }

/* ==========================================================================
   流程：驿站路线时间轴
   ========================================================================== */
.route { position: relative; padding: 20px 0; }
.route-track {
    display: grid; grid-template-columns: repeat(4,1fr); gap: 0;
    position: relative;
}
.route-track::before {
    content: ""; position: absolute; top: 38px; left: 8%; right: 8%; height: 3px;
    background: repeating-linear-gradient(90deg, var(--seal) 0 12px, transparent 12px 22px);
}
.route-stop { text-align: center; padding: 0 14px; position: relative; }
.route-dot {
    width: 76px; height: 76px; margin: 0 auto 16px; border-radius: 50%;
    background: var(--paper-soft); border: 2px solid var(--seal);
    display: grid; place-items: center; font-family: var(--f-kai); color: var(--seal);
    font-size: 1.5rem; position: relative; z-index: 2;
    box-shadow: 0 0 0 6px var(--paper);
}
.route-stop h4 { font-size: 1.06rem; margin-bottom: 6px; }
.route-stop p { font-size: .86rem; }

/* ==========================================================================
   案例：邮票册网格
   ========================================================================== */
.album { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.stamp-card {
    background: var(--paper-soft); padding: 14px; border: 1px solid var(--ink-line);
    border-radius: 4px; box-shadow: var(--shadow-paper);
    transition: transform .3s ease, box-shadow .3s ease; position: relative; display: block; color: var(--ink-soft);
}
.stamp-card:hover { transform: translateY(-6px) rotate(-1deg); box-shadow: 0 10px 24px rgba(74,53,32,.18); color: var(--ink-soft); }
.stamp-card .sc-img { height: 190px; overflow: hidden; border: 1px solid var(--ink-line); }
.stamp-card .sc-img img { width: 100%; height: 100%; object-fit: cover; filter: sepia(.1); transition: transform .5s ease; }
.stamp-card:hover .sc-img img { transform: scale(1.05); }
.sc-body { padding: 14px 6px 4px; }
.sc-body .tag { margin-bottom: 8px; }
.sc-body h3 { font-size: 1.08rem; margin-bottom: 6px; }
.sc-body p { font-size: .86rem; }

/* ==========================================================================
   资讯列表
   ========================================================================== */
.news-layout { display: grid; grid-template-columns: 1.6fr 1fr; gap: 40px; align-items: start; }
.news-list { display: flex; flex-direction: column; gap: 22px; }
.news-item {
    display: grid; grid-template-columns: 220px 1fr; gap: 22px;
    background: var(--paper-soft); border: 1px solid var(--ink-line); border-radius: 6px;
    overflow: hidden; box-shadow: var(--shadow-paper);
    transition: transform .3s ease, box-shadow .3s ease;
}
.news-item:hover { transform: translateX(6px); box-shadow: 0 8px 20px rgba(74,53,32,.14); }
.news-item .ni-img { height: 100%; min-height: 150px; overflow: hidden; }
.news-item .ni-img img { width: 100%; height: 100%; object-fit: cover; filter: sepia(.12); transition: transform .5s ease; }
.news-item:hover .ni-img img { transform: scale(1.06); }
.news-item .ni-body { padding: 18px 22px 18px 0; }
.news-item h3 { font-size: 1.16rem; margin-bottom: 8px; line-height: 1.45; }
.news-item h3 a { color: var(--ink); }
.news-item h3 a:hover { color: var(--seal); }
.news-item .ni-excerpt { font-size: .9rem; color: var(--ink-mute); margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-meta { display: flex; align-items: center; gap: 14px; font-size: .82rem; color: var(--ink-mute); }
.news-meta .nm-date { font-family: var(--f-kai); color: var(--seal); }
.news-meta .nm-tag { padding: 2px 10px; background: var(--paper-deep); border-radius: 20px; }

/* 资讯侧栏 */
.news-side { position: sticky; top: 90px; display: flex; flex-direction: column; gap: 22px; }
.side-card { background: var(--paper-soft); border: 1px solid var(--ink-line); border-radius: 6px; padding: 22px; box-shadow: var(--shadow-paper); }
.side-card h4 { font-size: 1.1rem; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 2px dashed var(--ink-line); position: relative; }
.side-card h4::after { content: ""; position: absolute; left: 0; bottom: -2px; width: 50px; height: 2px; background: var(--seal); }
.side-list li { display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px dashed var(--ink-line); }
.side-list li:last-child { border-bottom: 0; }
.side-list li .sl-rank {
    width: 26px; height: 26px; flex-shrink: 0; border-radius: 4px;
    background: var(--paper-deep); color: var(--seal-deep); font-family: var(--f-kai);
    display: grid; place-items: center; font-size: .9rem;
}
.side-list li:nth-child(1) .sl-rank { background: var(--seal); color: var(--paper-soft); }
.side-list li:nth-child(2) .sl-rank { background: var(--seal-soft); color: var(--paper-soft); }
.side-list li:nth-child(3) .sl-rank { background: var(--gold); color: var(--paper-soft); }
.side-list a { font-size: .9rem; color: var(--ink-soft); display: block; line-height: 1.5; }
.side-list a:hover { color: var(--seal); }
.side-list .sl-date { font-size: .78rem; color: var(--ink-mute); display: block; margin-top: 2px; }

/* ==========================================================================
   详情页
   ========================================================================== */
.article-shell { display: grid; grid-template-columns: 1.7fr 1fr; gap: 40px; align-items: start; }
.article-main {
    background: var(--paper-soft); border: 1px solid var(--ink-line); border-radius: 6px;
    padding: 40px; box-shadow: var(--shadow-paper); position: relative;
}
.article-main::before {
    content: ""; position: absolute; top: 14px; left: 14px; right: 14px; bottom: 14px;
    border: 1px solid var(--ink-line); border-radius: 3px; pointer-events: none; opacity: .5;
}
.article-head { text-align: center; margin-bottom: 28px; position: relative; }
.article-head h1 { margin-bottom: 16px; padding: 0 10px; }
.article-info { display: flex; justify-content: center; gap: 20px; font-size: .86rem; color: var(--ink-mute); flex-wrap: wrap; }
.article-info span b { color: var(--seal); font-family: var(--f-kai); }
.article-banner { margin: 24px -10px 28px; border-radius: 4px; overflow: hidden; border: 1px solid var(--ink-line); }
.article-banner img { width: 100%; max-height: 380px; object-fit: cover; }
.article-content { font-size: 1rem; line-height: 2; color: var(--ink-soft); position: relative; }
.article-content p { margin-bottom: 18px; text-indent: 2em; }
.article-content img { margin: 20px auto; border: 1px solid var(--ink-line); border-radius: 4px; max-width: 100%; }
.article-content h2, .article-content h3 { margin: 28px 0 14px; color: var(--ink); }
.article-content ul { margin: 14px 0 14px 2em; }
.article-content li { margin-bottom: 8px; list-style: square; color: var(--ink-soft); }
.article-content blockquote {
    margin: 20px 0; padding: 14px 22px; background: var(--paper-deep);
    border-left: 4px solid var(--seal); color: var(--ink); font-family: var(--f-kai); border-radius: 0 4px 4px 0;
}
.article-foot-nav { display: flex; justify-content: space-between; gap: 20px; margin-top: 36px; padding-top: 24px; border-top: 2px dashed var(--ink-line); }
.article-foot-nav a { font-size: .9rem; color: var(--ink-soft); }
.article-foot-nav a:hover { color: var(--seal); }

/* 详情侧栏相关列表（小卡） */
.rel-list { display: flex; flex-direction: column; gap: 14px; }
.rel-item { display: flex; gap: 12px; align-items: center; padding: 10px; border: 1px solid var(--ink-line); border-radius: 6px; background: var(--paper); transition: all .25s ease; }
.rel-item:hover { background: var(--paper-deep); transform: translateX(4px); }
.rel-item .ri-img { width: 90px; height: 64px; flex-shrink: 0; overflow: hidden; border-radius: 4px; }
.rel-item .ri-img img { width: 100%; height: 100%; object-fit: cover; }
.rel-item h5 { font-size: .92rem; line-height: 1.5; color: var(--ink); margin-bottom: 4px; }
.rel-item:hover h5 { color: var(--seal); }
.rel-item .ri-date { font-size: .78rem; color: var(--ink-mute); font-family: var(--f-kai); }

/* ==========================================================================
   页面通用 banner（内页顶部）
   ========================================================================== */
.page-hero {
    position: relative; padding: calc(var(--nav-h) + 60px) 0 60px; overflow: hidden;
    background: linear-gradient(160deg, var(--paper-deep) 0%, var(--paper) 70%);
    border-bottom: 3px double var(--ink-mute);
}
.page-hero::before {
    content: ""; position: absolute; inset: 0;
    background: repeating-linear-gradient(45deg, rgba(110,86,56,.05) 0 2px, transparent 2px 22px);
    pointer-events: none;
}
.page-hero .wrap { position: relative; z-index: 2; display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items: center; }
.page-hero h1 { margin-bottom: 16px; }
.page-hero .ph-lead { color: var(--ink-soft); font-size: 1rem; max-width: 540px; margin-bottom: 20px; }
.breadcrumb { font-size: .84rem; color: var(--ink-mute); margin-bottom: 18px; }
.breadcrumb a { color: var(--ink-mute); }
.breadcrumb a:hover { color: var(--seal); }
.breadcrumb span { margin: 0 8px; color: var(--ink-line); }
.ph-stamp {
    width: 200px; height: 200px; border-radius: 50%; margin-left: auto; position: relative;
    background: radial-gradient(circle at 35% 30%, var(--seal-soft), var(--seal) 60%, var(--seal-deep));
    color: var(--paper-soft); display: grid; place-items: center; text-align: center;
    box-shadow: var(--shadow-seal), inset 0 0 0 3px rgba(248,239,217,.3);
    transform: rotate(-8deg);
}
.ph-stamp::before { content: ""; position: absolute; inset: 10px; border: 1.5px dashed rgba(248,239,217,.4); border-radius: 50%; }
.ph-stamp b { font-family: var(--f-kai); font-size: 1.8rem; letter-spacing: 3px; }
.ph-stamp span { font-size: .76rem; letter-spacing: 2px; }

/* ==========================================================================
   关于 / 团队 / 优势 / 资质 等
   ========================================================================== */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.split.reverse > .split-img { order: 2; }
.split-img { border: 1px solid var(--ink-line); border-radius: 6px; overflow: hidden; box-shadow: var(--shadow-paper); position: relative; }
.split-img img { width: 100%; height: 100%; object-fit: cover; filter: sepia(.12); }
.split-img::after { content: ""; position: absolute; inset: 0; border: 6px solid rgba(243,230,196,.4); pointer-events: none; }
.split-body h2 { margin-bottom: 16px; }
.split-body p { margin-bottom: 14px; }
.split-list { margin-top: 18px; display: grid; gap: 12px; }
.split-list li { display: flex; gap: 12px; align-items: flex-start; font-size: .94rem; color: var(--ink-soft); }
.split-list li::before { content: "◆"; color: var(--seal); flex-shrink: 0; margin-top: 2px; }

/* 优势：四宫格 */
.adv-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 22px; }
.adv-cell { background: var(--paper-soft); border: 1px solid var(--ink-line); border-radius: 6px; padding: 28px 22px; text-align: center; box-shadow: var(--shadow-paper); transition: all .3s ease; position: relative; }
.adv-cell:hover { transform: translateY(-6px); border-color: var(--seal); }
.adv-ico { width: 64px; height: 64px; margin: 0 auto 16px; border-radius: 50%; background: var(--paper-deep); border: 2px solid var(--seal); display: grid; place-items: center; font-family: var(--f-kai); color: var(--seal); font-size: 1.6rem; }
.adv-cell h3 { font-size: 1.1rem; margin-bottom: 8px; }
.adv-cell p { font-size: .88rem; }

/* 价格分层 */
.tier-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 26px; align-items: stretch; }
.tier {
    background: var(--paper-soft); border: 1px solid var(--ink-line); border-radius: 8px;
    padding: 34px 28px; box-shadow: var(--shadow-paper); position: relative; transition: transform .3s ease;
    display: flex; flex-direction: column;
}
.tier:hover { transform: translateY(-6px); }
.tier.featured { border: 2px solid var(--seal); background: linear-gradient(180deg, var(--paper-soft), var(--paper-deep)); }
.tier.featured::before { content: "荐"; position: absolute; top: -14px; left: 50%; transform: translateX(-50%); background: var(--seal); color: var(--paper-soft); font-family: var(--f-kai); padding: 3px 18px; border-radius: 20px; font-size: .86rem; letter-spacing: 2px; box-shadow: var(--shadow-seal); }
.tier h3 { text-align: center; margin-bottom: 8px; }
.tier .tier-price { text-align: center; margin: 14px 0 22px; }
.tier .tier-price b { font-family: var(--f-kai); font-size: 2.4rem; color: var(--seal); }
.tier .tier-price span { font-size: .86rem; color: var(--ink-mute); }
.tier ul { flex: 1; display: grid; gap: 12px; margin-bottom: 24px; }
.tier li { font-size: .9rem; color: var(--ink-soft); display: flex; gap: 8px; align-items: flex-start; }
.tier li::before { content: "✓"; color: var(--seal); font-weight: 700; }
.tier .btn { width: 100%; justify-content: center; }

/* 团队 */
.team-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
.member { background: var(--paper-soft); border: 1px solid var(--ink-line); border-radius: 6px; overflow: hidden; box-shadow: var(--shadow-paper); transition: transform .3s ease; text-align: center; }
.member:hover { transform: translateY(-6px); }
.member .m-img { height: 230px; overflow: hidden; }
.member .m-img img { width: 100%; height: 100%; object-fit: cover; filter: sepia(.15); transition: transform .5s ease; }
.member:hover .m-img img { transform: scale(1.05); }
.member .m-body { padding: 18px; }
.member h4 { font-size: 1.1rem; margin-bottom: 4px; }
.member .m-role { font-family: var(--f-kai); color: var(--seal); font-size: .88rem; margin-bottom: 8px; }
.member p { font-size: .84rem; }

/* 资质 / 证书网格 */
.cert-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 22px; }
.cert { background: var(--paper-soft); border: 1px solid var(--ink-line); border-radius: 6px; padding: 22px; text-align: center; box-shadow: var(--shadow-paper); transition: transform .3s ease; }
.cert:hover { transform: translateY(-4px) rotate(-1deg); }
.cert .c-img, .cert .cert-img { height: 150px; margin-bottom: 14px; border: 1px solid var(--ink-line); overflow: hidden; }
.cert .c-img img, .cert .cert-img img { width: 100%; height: 100%; object-fit: cover; }
.cert h4 { font-size: 1rem; margin-bottom: 4px; }
.cert span { font-size: .82rem; color: var(--ink-mute); }
.cert .cert-body h4 { font-size: 1rem; margin-bottom: 4px; }
.cert .cert-body span { font-size: .82rem; color: var(--ink-mute); }

/* FAQ */
.faq-list { display: grid; gap: 14px; }
.faq { background: var(--paper-soft); border: 1px solid var(--ink-line); border-radius: 6px; overflow: hidden; box-shadow: var(--shadow-paper); }
.faq-q { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 18px 24px; cursor: pointer; font-family: var(--f-kai); font-size: 1.04rem; color: var(--ink); }
.faq-q::after { content: "+"; color: var(--seal); font-size: 1.4rem; transition: transform .3s ease; flex-shrink: 0; }
.faq.open .faq-q::after { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s ease, padding .35s ease; padding: 0 24px; }
.faq.open .faq-a { max-height: 500px; padding: 0 24px 20px; }
.faq-a p { font-size: .92rem; color: var(--ink-soft); }

/* 表单 / 咨询 */
.letter-form { background: var(--paper-soft); border: 1px solid var(--ink-line); border-radius: 8px; padding: 40px; box-shadow: var(--shadow-paper); position: relative; }
.letter-form::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 6px; background: linear-gradient(90deg, var(--seal), var(--paper-edge)); border-radius: 8px 8px 0 0; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 18px; }
.form-field { display: flex; flex-direction: column; gap: 6px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { font-family: var(--f-kai); font-size: .92rem; color: var(--ink-soft); }
.form-field input, .form-field textarea, .form-field select {
    padding: 12px 14px; border: 1px solid var(--ink-line); border-radius: 5px;
    background: var(--paper); color: var(--ink); font-family: var(--f-song); font-size: .94rem;
    transition: border-color .25s ease, box-shadow .25s ease;
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus {
    outline: none; border-color: var(--seal); box-shadow: 0 0 0 3px rgba(142,42,36,.12);
}
.form-field textarea { resize: vertical; min-height: 120px; }

/* CTA 条 */
.cta-band {
    position: relative; background: linear-gradient(120deg, var(--ink-soft), var(--ink));
    color: var(--paper-soft); border-radius: 10px; padding: 44px 50px;
    display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap;
    box-shadow: var(--shadow-paper); overflow: hidden;
}
.cta-band::before { content: "壹"; position: absolute; right: -10px; top: -30px; font-family: var(--f-kai); font-size: 12rem; color: rgba(142,42,36,.18); }
.cta-band h2 { color: var(--paper-soft); margin-bottom: 8px; position: relative; z-index: 2; }
.cta-band p { color: var(--paper-edge); position: relative; z-index: 2; }
.cta-band .btn { position: relative; z-index: 2; }

/* 数字统计条 */
.stat-row { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.stat-box { text-align: center; background: var(--paper-soft); border: 1px solid var(--ink-line); border-radius: 6px; padding: 26px 14px; box-shadow: var(--shadow-paper); }
.stat-box b { display: block; font-family: var(--f-kai); font-size: 2.2rem; color: var(--seal); margin-bottom: 4px; }
.stat-box span { font-size: .86rem; color: var(--ink-mute); }

/* 口碑评价 */
.review-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.review { background: var(--paper-soft); border: 1px solid var(--ink-line); border-radius: 6px; padding: 26px; box-shadow: var(--shadow-paper); position: relative; }
.review::before { content: "“"; position: absolute; top: 6px; left: 16px; font-family: var(--f-kai); font-size: 3.4rem; color: var(--seal); opacity: .35; line-height: 1; }
.review p { font-size: .92rem; margin: 22px 0 16px; position: relative; }
.review-foot { display: flex; align-items: center; gap: 12px; }
.review-foot .rf-ava { width: 42px; height: 42px; border-radius: 50%; background: var(--seal); color: var(--paper-soft); display: grid; place-items: center; font-family: var(--f-kai); }
.review-foot b { font-size: .92rem; color: var(--ink); }
.review-foot span { font-size: .78rem; color: var(--ink-mute); display: block; }

/* 通用卡片栅格兜底（letter-card / cert 等多列容器） */
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 22px; }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }

/* ==========================================================================
   滚动渐入动画
   ========================================================================== */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal.d1 { transition-delay: .1s; }
.reveal.d2 { transition-delay: .2s; }
.reveal.d3 { transition-delay: .3s; }
.reveal.d4 { transition-delay: .4s; }

/* 浮动印 */
@keyframes floaty { 0%,100% { transform: translateY(0) rotate(var(--r,0deg)); } 50% { transform: translateY(-10px) rotate(var(--r,0deg)); } }
.floaty { animation: floaty 5s ease-in-out infinite; }
.floaty.f1 { --r: -5deg; }
.floaty.f2 { --r: 4deg; animation-delay: 1.2s; }
.floaty.f3 { --r: -3deg; animation-delay: .6s; }

/* 印章盖落动画 */
@keyframes stampDown { 0% { opacity: 0; transform: scale(1.4) rotate(-12deg); } 60% { opacity: 1; transform: scale(.94) rotate(-7deg); } 100% { transform: scale(1) rotate(-6deg); } }
.stamp-in { animation: stampDown 1s ease both; }

/* ==========================================================================
   响应式
   ========================================================================== */
/* 中等屏（1280 以下）：导航项较多时提前切换汉堡，避免折行 */
@media (max-width: 1280px) {
    :root { --nav-h: 66px; }
    .nav-menu {
        position: fixed; top: var(--nav-h); left: 0; right: 0; bottom: 0;
        flex-direction: column; align-items: flex-start; gap: 0; padding: 18px 6%;
        background: linear-gradient(180deg, var(--paper-soft), var(--paper-deep));
        transform: translateX(100%); transition: transform .35s ease; overflow-y: auto;
        border-left: 3px solid var(--seal);
    }
    .nav-menu.open { transform: translateX(0); }
    .nav-menu > li { width: 100%; border-bottom: 1px dashed var(--ink-line); }
    .nav-menu > li > a { padding: 13px 4px; font-size: 1.08rem; }
    .nav-menu > li > a::after { display: none; }
    .nav-sub { position: static; transform: none; opacity: 1; visibility: visible; box-shadow: none; min-width: 0; padding: 4px 0 10px; background: transparent; border: 0; }
    .nav-sub a { padding: 8px 14px; font-size: .92rem; }
    .nav-toggle { display: flex; }
    .nav-cta { display: none; }
    .nav-menu .nav-cta-mobile { display: block; margin-top: 16px; }
}
@media (max-width: 1024px) {
    .hero-inner, .page-hero .wrap, .split, .news-layout, .article-shell { grid-template-columns: 1fr; }
    .split.reverse > .split-img { order: 0; }
    .hero-stamp { height: 360px; order: -1; }
    .ph-stamp { display: none; }
    .adv-grid, .stat-row, .cert-grid, .team-grid, .grid-4 { grid-template-columns: repeat(2,1fr); }
    .grid-3 { grid-template-columns: repeat(2,1fr); }
    .foot-grid { grid-template-columns: 1fr 1fr; }
    .foot-postmark { display: none; }
}
@media (max-width: 768px) {
    :root { --nav-h: 64px; }
    body { font-size: 15px; }
    .section, .section-tight { padding: 50px 0; }
    .service-grid, .album, .tier-grid, .review-grid, .route-track, .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .svc-card:nth-child(2), .svc-card:nth-child(5) { transform: none; }
    .svc-card:nth-child(2):hover, .svc-card:nth-child(5):hover { transform: translateY(-6px); }
    .route-track::before { display: none; }
    .news-item { grid-template-columns: 1fr; }
    .news-item .ni-img { min-height: 180px; }
    .news-item .ni-body { padding: 16px 18px; }
    .hero-stats, .stat-row, .adv-grid, .cert-grid, .team-grid, .grid-4 { grid-template-columns: repeat(2,1fr); }
    .hero-stat, .stat-box { border-right: 0; border-bottom: 1px dashed var(--ink-line); }
    .foot-grid { grid-template-columns: 1fr; gap: 30px; }
    .form-row { grid-template-columns: 1fr; }
    .article-main { padding: 26px 20px; }
    .cta-band { padding: 30px 24px; flex-direction: column; text-align: center; }
    .wrap { width: 94%; }
    .brand-txt b { font-size: 1rem; letter-spacing: 1px; }
    .brand-txt span { font-size: .56rem; letter-spacing: 2px; }
    .brand-seal { width: 38px; height: 38px; font-size: .9rem; }
}
@media (max-width: 480px) {
    .hero-stats, .stat-row, .adv-grid, .cert-grid, .team-grid, .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .stamp-main { width: 220px; height: 220px; }
    .stamp-main b { font-size: 1.9rem; }
    .hero-actions .btn { width: 100%; justify-content: center; }
}