/* ==========================================================================
   速涂宝官网样式表
   主色调：莫兰迪绿 + 米白（呼应"会呼吸的环保墙"理念）
   设计原则：高端、克制、可信赖、移动端优先、信息前置
   ========================================================================== */

/* ---------- 设计变量 ---------- */
:root {
    /* 莫兰迪绿系（低饱和，环保/自然感） */
    --green-900: #2d3f31;
    --green-700: #4a6b50;
    --green-600: #5d7d63;
    --green-500: #6b8e6b;
    --green-300: #a8c0a8;
    --green-100: #e8efe6;

    /* 米白 / 中性色（高级灰底） */
    --cream:    #f4f1ea;
    --cream-2:  #ede8dc;
    --warm-bg:  #faf8f3;
    --white:    #ffffff;

    --ink:      #1f2620;   /* 主文字（深墨绿黑） */
    --ink-2:    #3d4438;   /* 次级文字 */
    --ink-3:    #6b7268;   /* 辅助文字 */
    --line:     #d8d3c6;   /* 分割线 */

    --gold:     #b89968;   /* 点缀金（用于荣誉徽章） */
    --warn:     #a85c3a;   /* 痛点色（克制使用） */

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(45, 63, 49, 0.06);
    --shadow:    0 8px 30px rgba(45, 63, 49, 0.10);
    --shadow-lg: 0 18px 50px rgba(45, 63, 49, 0.16);

    /* 尺寸 */
    --maxw: 1200px;
    --radius: 14px;
    --radius-sm: 8px;
}

/* ---------- 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", sans-serif;
    color: var(--ink);
    background: var(--warm-bg);
    line-height: 1.75;
    font-size: 16px;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

a { color: var(--green-700); text-decoration: none; transition: color .25s; }
a:hover { color: var(--green-900); }

ul, ol { list-style: none; }

/* ---------- 通用容器 ---------- */
.container {
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 24px;
}

section { padding: 88px 0; position: relative; }

.section-head { text-align: center; max-width: 760px; margin: 0 auto 56px; }

.section-head .eyebrow {
    display: inline-block;
    font-size: 13px;
    letter-spacing: 3px;
    color: var(--green-600);
    font-weight: 600;
    margin-bottom: 14px;
    text-transform: uppercase;
}

.section-head h2 {
    font-size: clamp(28px, 4vw, 40px);
    line-height: 1.3;
    color: var(--green-900);
    font-weight: 700;
    letter-spacing: 1px;
}

.section-head .sub {
    margin-top: 18px;
    color: var(--ink-3);
    font-size: 17px;
}

.section-head .sub strong { color: var(--green-600); font-weight: 600; }

/* 分隔细线（绿色装饰） */
.section-head::after {
    content: "";
    display: block;
    width: 56px;
    height: 3px;
    background: var(--green-500);
    margin: 26px auto 0;
    border-radius: 2px;
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 32px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all .3s cubic-bezier(.4,0,.2,1);
    text-align: center;
    line-height: 1;
}

.btn-primary {
    background: var(--green-700);
    color: var(--white);
    box-shadow: 0 8px 22px rgba(74, 107, 80, 0.28);
}
.btn-primary:hover {
    background: var(--green-900);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(45, 63, 49, 0.34);
}

.btn-ghost {
    background: transparent;
    color: var(--green-700);
    border: 1.5px solid var(--green-600);
}
.btn-ghost:hover {
    background: var(--green-700);
    color: var(--white);
}

/* ==========================================================================
   顶部导航
   ========================================================================== */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(250, 248, 243, 0.85);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid transparent;
    transition: all .3s;
}
.site-header.scrolled {
    background: rgba(250, 248, 243, 0.95);
    border-bottom-color: var(--line);
    box-shadow: var(--shadow-sm);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 20px;
    color: var(--green-900);
    letter-spacing: 1px;
}
.logo-mark {
    width: 38px; height: 38px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--green-600), var(--green-900));
    display: grid; place-items: center;
    color: var(--white);
    font-size: 18px;
    font-weight: 700;
}
.logo small { display: block; font-size: 11px; color: var(--ink-3); font-weight: 400; letter-spacing: 2px; }

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}
.nav-menu a {
    color: var(--ink-2);
    font-size: 15px;
    font-weight: 500;
    position: relative;
}
.nav-menu a::after {
    content: "";
    position: absolute;
    left: 0; bottom: -6px;
    width: 0; height: 2px;
    background: var(--green-500);
    transition: width .3s;
}
.nav-menu a:hover { color: var(--green-700); }
.nav-menu a:hover::after { width: 100%; }

.nav-cta {
    display: flex; align-items: center; gap: 14px;
}
.nav-phone {
    font-weight: 700;
    color: var(--green-900);
    font-size: 15px;
}

.nav-toggle {
    display: none;
    width: 42px; height: 42px;
    background: transparent;
    border: 1px solid var(--line);
    border-radius: 10px;
    cursor: pointer;
    position: relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
    content: "";
    position: absolute;
    left: 50%; top: 50%;
    width: 20px; height: 2px;
    background: var(--green-900);
    transform: translate(-50%, -50%);
    transition: all .3s;
}
.nav-toggle span::before { transform: translate(-50%, -7px); }
.nav-toggle span::after  { transform: translate(-50%, 7px); }
.nav-toggle.open span { background: transparent; }
.nav-toggle.open span::before { transform: translate(-50%, 0) rotate(45deg); }
.nav-toggle.open span::after  { transform: translate(-50%, 0) rotate(-45deg); }

/* ==========================================================================
   首屏 Hero
   ========================================================================== */
.hero {
    min-height: 100vh;
    padding: 130px 0 80px;
    display: flex;
    align-items: center;
    background:
        linear-gradient(180deg, rgba(250,248,243,.86) 0%, rgba(250,248,243,.55) 100%),
        url("https://images.unsplash.com/photo-1615529182904-14819c35db37?auto=format&fit=crop&w=1920&q=80") center/cover no-repeat,
        var(--cream);
    position: relative;
}
.hero::after {
    content: "";
    position: absolute;
    left: 0; right: 0; bottom: 0;
    height: 90px;
    background: linear-gradient(180deg, transparent, var(--warm-bg));
    pointer-events: none;
}

.hero-inner {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 56px;
    align-items: center;
    width: 100%;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--green-100);
    color: var(--green-700);
    padding: 8px 18px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 26px;
}
.hero-tag .dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--green-500);
    animation: breathe 2.4s ease-in-out infinite;
}
@keyframes breathe {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.5); opacity: .5; }
}

.hero h1 {
    font-size: clamp(34px, 5.4vw, 58px);
    line-height: 1.18;
    color: var(--green-900);
    font-weight: 800;
    letter-spacing: 1px;
    margin-bottom: 22px;
}
.hero h1 em {
    font-style: normal;
    color: var(--green-600);
    position: relative;
}
.hero h1 em::after {
    content: "";
    position: absolute;
    left: 0; right: 0; bottom: 4px;
    height: 12px;
    background: var(--green-300);
    opacity: .4;
    z-index: -1;
}

.hero .lead {
    font-size: 18px;
    color: var(--ink-2);
    margin-bottom: 14px;
    max-width: 540px;
}
.hero .lead strong { color: var(--green-700); }

.hero-quick {
    margin: 28px 0 34px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px 14px;
}
.hero-quick li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    color: var(--ink-2);
    font-weight: 500;
}
.hero-quick li svg { color: var(--green-500); flex-shrink: 0; }

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 36px;
}

.hero-trust {
    display: flex;
    flex-wrap: wrap;
    gap: 28px 36px;
    padding-top: 28px;
    border-top: 1px solid var(--line);
}
.hero-trust .item .num {
    font-size: 30px;
    font-weight: 800;
    color: var(--green-700);
    line-height: 1;
}
.hero-trust .item .num small { font-size: 16px; font-weight: 600; }
.hero-trust .item .lbl {
    font-size: 13px;
    color: var(--ink-3);
    margin-top: 6px;
}

/* Hero 右侧浮动卡 */
.hero-card {
    position: relative;
}
.hero-card .card-img {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    aspect-ratio: 4 / 5;
}
.hero-card .card-img img {
    width: 100%; height: 100%; object-fit: cover;
}

.hero-badge {
    position: absolute;
    background: var(--white);
    border-radius: 16px;
    padding: 16px 20px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
}
.hero-badge .ico {
    width: 42px; height: 42px;
    border-radius: 12px;
    background: var(--green-100);
    color: var(--green-600);
    display: grid; place-items: center;
    flex-shrink: 0;
}
.hero-badge .t { font-size: 14px; font-weight: 700; color: var(--green-900); line-height: 1.2; }
.hero-badge .s { font-size: 12px; color: var(--ink-3); margin-top: 2px; }

.hero-badge.b1 { left: -28px; top: 28px; }
.hero-badge.b2 { right: -24px; bottom: 36px; }

/* ==========================================================================
   痛点对比
   ========================================================================== */
.pain { background: var(--cream); }

.compare-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 24px;
    align-items: stretch;
}

.compare-card {
    border-radius: var(--radius);
    padding: 36px 30px;
    background: var(--white);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--line);
}
.compare-card.bad { background: #fbf6f3; border-color: #ecd9d0; }
.compare-card.good {
    background: linear-gradient(160deg, var(--green-100), #f0f6ee);
    border-color: var(--green-300);
    box-shadow: 0 12px 36px rgba(107, 142, 107, 0.18);
}

.compare-card h3 {
    font-size: 22px;
    margin-bottom: 6px;
    display: flex; align-items: center; gap: 10px;
}
.compare-card.bad h3 { color: var(--warn); }
.compare-card.good h3 { color: var(--green-700); }
.compare-card .tagline { color: var(--ink-3); font-size: 14px; margin-bottom: 22px; }

.compare-card ul li {
    position: relative;
    padding: 10px 0 10px 30px;
    border-bottom: 1px dashed var(--line);
    font-size: 15px;
    color: var(--ink-2);
}
.compare-card ul li:last-child { border-bottom: none; }
.compare-card ul li::before {
    content: "";
    position: absolute;
    left: 0; top: 14px;
    width: 18px; height: 18px;
    border-radius: 50%;
    display: grid; place-items: center;
    font-size: 11px; font-weight: 700;
}
.compare-card.bad ul li::before {
    content: "✕";
    background: #f3dcd2;
    color: var(--warn);
}
.compare-card.good ul li::before {
    content: "✓";
    background: var(--green-500);
    color: var(--white);
}

.compare-vs {
    display: grid;
    place-items: center;
    color: var(--green-600);
}
.compare-vs span {
    width: 56px; height: 56px;
    border-radius: 50%;
    background: var(--white);
    border: 2px solid var(--green-300);
    display: grid; place-items: center;
    font-weight: 800;
    font-size: 15px;
    letter-spacing: 1px;
    box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   6 大优势
   ========================================================================== */
.adv-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.adv-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 34px 28px;
    border: 1px solid var(--line);
    transition: all .35s;
    position: relative;
    overflow: hidden;
}
.adv-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--green-500), var(--green-700));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .4s;
}
.adv-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow);
    border-color: var(--green-300);
}
.adv-card:hover::before { transform: scaleX(1); }

.adv-num {
    font-size: 13px;
    font-weight: 700;
    color: var(--green-500);
    letter-spacing: 2px;
    margin-bottom: 10px;
}
.adv-ico {
    width: 56px; height: 56px;
    border-radius: 14px;
    background: var(--green-100);
    color: var(--green-600);
    display: grid; place-items: center;
    margin-bottom: 18px;
}
.adv-card h3 {
    font-size: 20px;
    color: var(--green-900);
    margin-bottom: 12px;
    font-weight: 700;
}
.adv-card p {
    font-size: 15px;
    color: var(--ink-2);
    line-height: 1.8;
}
.adv-card .hl {
    margin-top: 16px;
    padding: 10px 14px;
    background: var(--green-100);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--green-700);
    font-weight: 600;
}

/* ==========================================================================
   应用场景
   ========================================================================== */
.scenes { background: var(--cream); }

.scene-tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
}
.scene-tab {
    padding: 10px 22px;
    border-radius: 50px;
    background: var(--white);
    border: 1px solid var(--line);
    color: var(--ink-2);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all .25s;
}
.scene-tab:hover { color: var(--green-700); border-color: var(--green-300); }
.scene-tab.active {
    background: var(--green-700);
    color: var(--white);
    border-color: var(--green-700);
}

.scene-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}
.scene-card {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    aspect-ratio: 3 / 4;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}
.scene-card img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform .6s;
}
.scene-card:hover img { transform: scale(1.08); }
.scene-card .overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(31,38,32,.85) 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 22px 20px;
    color: var(--white);
}
.scene-card .overlay h4 { font-size: 19px; font-weight: 700; margin-bottom: 4px; }
.scene-card .overlay p { font-size: 13px; opacity: .9; }
.scene-card.tall { grid-row: span 2; aspect-ratio: 3 / 8.4; }

.scene-tag {
    display: inline-block;
    font-size: 11px;
    background: rgba(255,255,255,.22);
    backdrop-filter: blur(4px);
    padding: 3px 10px;
    border-radius: 50px;
    margin-bottom: 8px;
    align-self: flex-start;
}

/* 场景补充文字卡 */
.scene-text-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 30px;
    border: 1px solid var(--line);
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.scene-text-card h4 {
    font-size: 19px;
    color: var(--green-700);
    margin-bottom: 12px;
}
.scene-text-card p { font-size: 14px; color: var(--ink-2); line-height: 1.8; }
.scene-text-card ul { margin-top: 14px; }
.scene-text-card li {
    padding: 6px 0 6px 22px;
    position: relative;
    font-size: 14px;
    color: var(--ink-2);
}
.scene-text-card li::before {
    content: "▸";
    position: absolute; left: 0;
    color: var(--green-500);
}

/* ==========================================================================
   技术参数
   ========================================================================== */
.specs { background: linear-gradient(180deg, var(--green-900), var(--green-700));
    color: var(--white); }
.specs .section-head h2 { color: var(--white); }
.specs .section-head .sub { color: rgba(255,255,255,.78); }
.specs .section-head .eyebrow { color: var(--green-300); }
.specs .section-head::after { background: var(--green-300); }

.spec-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.spec-card {
    background: rgba(255,255,255,.08);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,.14);
    border-radius: var(--radius);
    padding: 28px 22px;
    text-align: center;
    transition: all .3s;
}
.spec-card:hover {
    background: rgba(255,255,255,.14);
    transform: translateY(-4px);
}
.spec-card .val {
    font-size: 38px;
    font-weight: 800;
    color: var(--white);
    line-height: 1;
    margin-bottom: 6px;
}
.spec-card .val small { font-size: 18px; font-weight: 600; opacity: .85; }
.spec-card .name { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.spec-card .desc { font-size: 12px; opacity: .72; line-height: 1.6; }

.spec-note {
    text-align: center;
    margin-top: 36px;
    font-size: 13px;
    color: rgba(255,255,255,.65);
}
.spec-note a { color: var(--green-300); text-decoration: underline; }

/* ==========================================================================
   施工 & 服务流程
   ========================================================================== */
.process-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 36px;
}
.process-box {
    background: var(--white);
    border-radius: var(--radius);
    padding: 36px 32px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--line);
}
.process-box h3 {
    font-size: 22px;
    color: var(--green-900);
    margin-bottom: 6px;
    display: flex; align-items: center; gap: 10px;
}
.process-box h3 .ico {
    width: 36px; height: 36px;
    border-radius: 10px;
    background: var(--green-100);
    color: var(--green-600);
    display: grid; place-items: center;
}
.process-box .desc { color: var(--ink-3); font-size: 14px; margin-bottom: 26px; }

.steps { display: flex; flex-direction: column; gap: 0; }
.step {
    display: flex;
    gap: 16px;
    padding: 14px 0;
    position: relative;
}
.step:not(:last-child)::after {
    content: "";
    position: absolute;
    left: 17px; top: 44px; bottom: -8px;
    width: 2px;
    background: var(--green-300);
    opacity: .5;
}
.step .n {
    width: 36px; height: 36px;
    border-radius: 50%;
    background: var(--green-700);
    color: var(--white);
    display: grid; place-items: center;
    font-weight: 700;
    font-size: 14px;
    flex-shrink: 0;
    z-index: 1;
}
.step .body h5 { font-size: 15px; color: var(--green-900); font-weight: 600; margin-bottom: 2px; }
.step .body p { font-size: 13px; color: var(--ink-3); line-height: 1.6; }

.warranty-bar {
    margin-top: 40px;
    background: linear-gradient(135deg, var(--green-100), #f0f6ee);
    border: 1px solid var(--green-300);
    border-radius: var(--radius);
    padding: 28px 32px;
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
    justify-content: space-between;
}
.warranty-bar .left { display: flex; align-items: center; gap: 16px; }
.warranty-bar .badge {
    width: 60px; height: 60px;
    border-radius: 50%;
    background: var(--green-700);
    color: var(--white);
    display: grid; place-items: center;
    text-align: center;
    font-size: 11px; font-weight: 700;
    line-height: 1.2;
    flex-shrink: 0;
}
.warranty-bar h4 { font-size: 19px; color: var(--green-900); }
.warranty-bar p { font-size: 14px; color: var(--ink-2); margin-top: 2px; }

/* ==========================================================================
   常见问题 FAQ
   ========================================================================== */
.faq { background: var(--cream); }

.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    margin-bottom: 14px;
    overflow: hidden;
    transition: all .25s;
}
.faq-item:hover { border-color: var(--green-300); }
.faq-item.open { box-shadow: var(--shadow-sm); border-color: var(--green-500); }

.faq-q {
    width: 100%;
    text-align: left;
    background: transparent;
    border: none;
    padding: 22px 24px;
    font-size: 16px;
    font-weight: 600;
    color: var(--green-900);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    line-height: 1.5;
}
.faq-q .q-ico {
    width: 28px; height: 28px;
    border-radius: 50%;
    background: var(--green-100);
    color: var(--green-600);
    display: grid; place-items: center;
    flex-shrink: 0;
    transition: transform .3s;
    font-size: 18px;
}
.faq-item.open .q-ico { transform: rotate(45deg); background: var(--green-700); color: var(--white); }

.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s ease;
}
.faq-a-inner {
    padding: 0 24px 24px;
    padding-left: 64px;
    color: var(--ink-2);
    font-size: 15px;
    line-height: 1.85;
}
.faq-a-inner strong { color: var(--green-700); }

/* ==========================================================================
   关于我们 / 创始人故事
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 56px;
    align-items: center;
}
.about-img {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    aspect-ratio: 4 / 5;
    position: relative;
}
.about-img img { width: 100%; height: 100%; object-fit: cover; }
.about-img .quote-card {
    position: absolute;
    left: 24px; bottom: 24px; right: 24px;
    background: rgba(255,255,255,.95);
    backdrop-filter: blur(8px);
    border-radius: 12px;
    padding: 18px 20px;
    border-left: 4px solid var(--green-500);
}
.about-img .quote-card p {
    font-size: 14px;
    color: var(--green-900);
    font-weight: 500;
    line-height: 1.6;
}
.about-img .quote-card .by {
    margin-top: 8px;
    font-size: 12px;
    color: var(--ink-3);
}

.about-text h2 {
    font-size: clamp(26px, 3.5vw, 36px);
    color: var(--green-900);
    margin-bottom: 8px;
    line-height: 1.3;
}
.about-text .eyebrow {
    color: var(--green-600);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 14px;
    display: block;
}
.about-text p {
    color: var(--ink-2);
    margin-bottom: 16px;
    font-size: 16px;
    line-height: 1.9;
}
.about-text p strong { color: var(--green-700); }

.about-credentials {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    margin-top: 26px;
}
.cred-item {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    padding: 16px 18px;
    display: flex;
    gap: 12px;
    align-items: flex-start;
}
.cred-item .ico {
    width: 36px; height: 36px;
    border-radius: 10px;
    background: var(--green-100);
    color: var(--green-600);
    display: grid; place-items: center;
    flex-shrink: 0;
}
.cred-item h5 { font-size: 14px; color: var(--green-900); font-weight: 600; }
.cred-item p { font-size: 12px; color: var(--ink-3); margin: 2px 0 0; line-height: 1.5; }

/* ==========================================================================
   CTA 区块
   ========================================================================== */
.cta {
    background:
        linear-gradient(135deg, rgba(45,63,49,.92), rgba(74,107,80,.88)),
        url("https://images.unsplash.com/photo-1631679706909-1844bbd07221?auto=format&fit=crop&w=1920&q=80") center/cover no-repeat;
    color: var(--white);
    text-align: center;
    padding: 88px 0;
}
.cta h2 {
    font-size: clamp(28px, 4vw, 40px);
    margin-bottom: 16px;
    font-weight: 700;
    line-height: 1.3;
}
.cta p {
    font-size: 17px;
    opacity: .9;
    max-width: 600px;
    margin: 0 auto 32px;
}
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta .btn-primary {
    background: var(--white);
    color: var(--green-900);
    box-shadow: 0 12px 30px rgba(0,0,0,.25);
}
.cta .btn-primary:hover { background: var(--green-100); color: var(--green-900); }
.cta .btn-ghost {
    color: var(--white);
    border-color: rgba(255,255,255,.6);
}
.cta .btn-ghost:hover { background: rgba(255,255,255,.15); color: var(--white); }

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer {
    background: #1a241d;
    color: rgba(255,255,255,.7);
    padding: 64px 0 28px;
}
.footer-top {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer-brand .logo { color: var(--white); margin-bottom: 16px; }
.footer-brand .logo small { color: rgba(255,255,255,.5); }
.footer-brand p { font-size: 14px; line-height: 1.8; max-width: 320px; }

.footer-col h5 {
    color: var(--white);
    font-size: 15px;
    margin-bottom: 18px;
    font-weight: 600;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a, .footer-col ul li {
    color: rgba(255,255,255,.65);
    font-size: 14px;
    transition: color .25s;
}
.footer-col ul li a:hover { color: var(--green-300); }

.qr-row { display: flex; gap: 18px; margin-top: 6px; }
.qr-box {
    text-align: center;
}
.qr-box .qr {
    width: 110px; height: 110px;
    background: var(--white);
    border-radius: 10px;
    padding: 8px;
    display: grid; place-items: center;
}
.qr-box .qr svg { width: 100%; height: 100%; }
.qr-box .qr img {
    width: 100%;
    height: 100%;
    object-fit: contain;   /* contain 保证二维码完整不被裁剪，可扫 */
    border-radius: 4px;
}
.qr-box .lbl {
    font-size: 12px;
    color: rgba(255,255,255,.6);
    margin-top: 8px;
}

.footer-contact .phone-big {
    font-size: 26px;
    font-weight: 800;
    color: var(--white);
    letter-spacing: 1px;
    margin: 8px 0 4px;
    display: block;
}
.footer-contact .phone-big .ico { color: var(--green-300); margin-right: 6px; }
.footer-contact .tip { font-size: 13px; color: rgba(255,255,255,.6); }

.footer-bottom {
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 13px;
    color: rgba(255,255,255,.5);
}
.footer-bottom a { color: rgba(255,255,255,.5); }
.footer-bottom a:hover { color: var(--green-300); }

/* ==========================================================================
   悬浮电话按钮（移动端友好）
   ========================================================================== */
.float-call {
    position: fixed;
    right: 18px; bottom: 18px;
    z-index: 900;
    background: var(--green-700);
    color: var(--white);
    width: 60px; height: 60px;
    border-radius: 50%;
    display: grid; place-items: center;
    box-shadow: 0 10px 26px rgba(45,63,49,.4);
    text-align: center;
    font-size: 11px;
    line-height: 1.2;
    transition: all .3s;
}
.float-call:hover { background: var(--green-900); transform: scale(1.06); }
.float-call svg { width: 24px; height: 24px; }

/* ==========================================================================
   滚动入场动画
   ========================================================================== */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity .7s ease, transform .7s ease;
}
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal.d1 { transition-delay: .08s; }
.reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; }
.reveal.d4 { transition-delay: .32s; }

/* ==========================================================================
   响应式：平板
   ========================================================================== */
@media (max-width: 992px) {
    section { padding: 64px 0; }

    .hero-inner { grid-template-columns: 1fr; gap: 40px; }
    .hero-card { max-width: 460px; margin: 0 auto; }
    .hero-badge.b1 { left: -12px; }
    .hero-badge.b2 { right: -10px; }

    .compare-grid { grid-template-columns: 1fr; gap: 14px; }
    .compare-vs { padding: 6px 0; }
    .compare-vs span { width: 48px; height: 48px; }

    .adv-grid { grid-template-columns: repeat(2, 1fr); }

    .scene-grid { grid-template-columns: repeat(3, 1fr); }
    .spec-grid { grid-template-columns: repeat(2, 1fr); }

    .process-split { grid-template-columns: 1fr; gap: 24px; }

    .about-grid { grid-template-columns: 1fr; gap: 36px; }
    .about-img { max-width: 460px; margin: 0 auto; }

    .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
    .footer-brand { grid-column: 1 / -1; }
}

/* ==========================================================================
   响应式：手机
   ========================================================================== */
@media (max-width: 640px) {
    body { font-size: 15px; }

    .nav-menu, .nav-phone { display: none; }
    .nav-toggle { display: block; }

    /* 移动端展开菜单 */
    .nav-menu.mobile-open {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 70px; left: 0; right: 0;
        background: var(--warm-bg);
        padding: 20px 24px 28px;
        gap: 6px;
        border-bottom: 1px solid var(--line);
        box-shadow: var(--shadow);
        max-height: calc(100vh - 70px);
        overflow-y: auto;
    }
    .nav-menu.mobile-open a {
        width: 100%;
        padding: 12px 4px;
        border-bottom: 1px solid var(--line);
        font-size: 16px;
    }
    .nav-menu.mobile-open a::after { display: none; }
    .nav-menu.mobile-open .btn { margin-top: 12px; }

    .hero { padding: 110px 0 60px; min-height: auto; }
    .hero h1 { font-size: 32px; }
    .hero .lead { font-size: 16px; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; justify-content: center; }
    .hero-trust { gap: 18px 24px; }
    .hero-trust .item .num { font-size: 24px; }
    .hero-badge { padding: 12px 14px; }
    .hero-badge .ico { width: 36px; height: 36px; }
    .hero-badge .t { font-size: 13px; }
    .hero-badge .s { font-size: 11px; }
    .hero-badge.b1 { left: -8px; top: 14px; }
    .hero-badge.b2 { right: -6px; bottom: 18px; }

    .section-head { margin-bottom: 36px; }
    .section-head h2 { font-size: 25px; }

    .adv-grid { grid-template-columns: 1fr; }
    .adv-card { padding: 28px 22px; }

    .scene-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .scene-card .overlay { padding: 14px; }
    .scene-card .overlay h4 { font-size: 15px; }
    .scene-card .overlay p { font-size: 11px; }
    .scene-card.tall { grid-row: span 1; aspect-ratio: 3/4; }

    .spec-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .spec-card { padding: 22px 14px; }
    .spec-card .val { font-size: 30px; }

    .process-box { padding: 26px 22px; }
    .warranty-bar { padding: 22px; text-align: center; }
    .warranty-bar .left { justify-content: center; width: 100%; }

    .faq-q { padding: 18px 18px; font-size: 15px; }
    .faq-a-inner { padding-left: 18px; padding-right: 18px; font-size: 14px; }

    .footer-top { grid-template-columns: 1fr; gap: 28px; }
    .qr-row { justify-content: flex-start; }
    .footer-bottom { flex-direction: column; text-align: center; }

    .float-call { width: 54px; height: 54px; right: 14px; bottom: 14px; }
}

/* 极小屏 */
@media (max-width: 360px) {
    .hero h1 { font-size: 28px; }
}

/* 尊重用户的减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: .01ms !important;
        transition-duration: .01ms !important;
        scroll-behavior: auto !important;
    }
    .reveal { opacity: 1; transform: none; }
}