/* ============ 中国传统文化主题 ============ */
:root {
    --ink: #1c1a16;          /* 墨色 */
    --ink-soft: #4a4438;     /* 淡墨 */
    --paper: #f7f1e2;        /* 宣纸 */
    --paper-2: #efe5cd;      /* 宣纸（深） */
    --card: #fffdf6;         /* 卡片纸白 */
    --cinnabar: #9e2b25;     /* 朱砂 */
    --cinnabar-2: #7b1f1a;   /* 朱砂（深） */
    --gold: #b8934e;         /* 描金 */
    --gold-2: #d9bd7e;       /* 描金（浅） */
    --blue: #2b4a7d;         /* 青花 */
    --line: #ddcfb2;         /* 界线 */
    --shadow: 0 8px 26px rgba(70, 52, 20, 0.09);
}

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

body {
    font-family: "Songti SC", "STSong", "SimSun", "Noto Serif SC", serif;
    line-height: 1.9;
    color: var(--ink);
    background-color: var(--paper);
    /* 宣纸纹理 + 淡雅晕染 */
    background-image:
        radial-gradient(circle at 15% 8%, rgba(184, 147, 78, 0.10), transparent 42%),
        radial-gradient(circle at 85% 30%, rgba(158, 43, 37, 0.06), transparent 38%),
        repeating-linear-gradient(0deg, rgba(90, 70, 30, 0.025) 0 1px, transparent 1px 4px),
        repeating-linear-gradient(90deg, rgba(90, 70, 30, 0.02) 0 1px, transparent 1px 4px);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

h1, h2, h3, h4, .site-title {
    font-family: "Kaiti SC", "STKaiti", "KaiTi", "SimSun", serif;
    font-weight: 700;
    letter-spacing: 0.02em;
}

/* ============ 头部 ============ */
header {
    background: rgba(247, 241, 226, 0.94);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    border-bottom: 3px double var(--gold);
    position: sticky;
    top: 0;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 0.85rem;
    padding-bottom: 0.85rem;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.logo-seal {
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(160deg, var(--cinnabar), var(--cinnabar-2));
    color: #fdf6e6;
    font-size: 1.15rem;
    border-radius: 5px;
    box-shadow: 0 3px 10px rgba(158, 43, 37, 0.35);
}

.site-title {
    font-size: 1.35rem;
    color: var(--cinnabar);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--cinnabar);
    font-size: 1.7rem;
    cursor: pointer;
    padding: 0.4rem 0.6rem;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 0.35rem;
    align-items: center;
}

nav a {
    color: var(--ink-soft);
    text-decoration: none;
    font-size: 0.98rem;
    padding: 0.4rem 0.85rem;
    border-radius: 4px;
    position: relative;
    transition: color 0.2s, background 0.2s;
}

nav a::after {
    content: "";
    position: absolute;
    left: 0.85rem;
    right: 0.85rem;
    bottom: 0.2rem;
    height: 1px;
    background: var(--gold);
    transform: scaleX(0);
    transition: transform 0.25s;
}

nav a:hover {
    color: var(--cinnabar);
}

nav a:hover::after {
    transform: scaleX(1);
}

nav .nav-register {
    background: linear-gradient(180deg, var(--cinnabar), var(--cinnabar-2));
    color: #fdf6e6 !important;
    border: 1px solid var(--gold);
    padding: 0.5rem 1.25rem;
    font-weight: 700;
}

nav .nav-register::after {
    display: none;
}

nav .nav-register:hover {
    background: linear-gradient(180deg, var(--cinnabar-2), var(--cinnabar-2));
    color: #fff !important;
}

/* ============ Hero 第一屏 ============ */
.hero {
    position: relative;
    overflow: hidden;
    background: linear-gradient(160deg, #26231c 0%, #171612 55%, #2a1d1a 100%);
    color: var(--paper);
    padding: 5.5rem 0 4.5rem;
}

/* 朱日 */
.hero::before {
    content: "";
    position: absolute;
    top: -60px;
    right: 8%;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(158, 43, 37, 0.55), rgba(158, 43, 37, 0) 68%);
    pointer-events: none;
}

/* 远山云影 */
.hero::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 160px;
    background:
        radial-gradient(120% 100% at 10% 100%, rgba(184, 147, 78, 0.14), transparent 60%),
        radial-gradient(120% 100% at 90% 100%, rgba(43, 74, 125, 0.16), transparent 60%);
    pointer-events: none;
}

.hero-seal {
    position: absolute;
    top: 3rem;
    right: 4%;
    z-index: 2;
    width: 62px;
    height: 62px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    line-height: 1.15;
    font-family: "Kaiti SC", "STKaiti", "KaiTi", serif;
    font-size: 0.85rem;
    color: #fdf6e6;
    background: linear-gradient(160deg, var(--cinnabar), var(--cinnabar-2));
    border-radius: 6px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.45), inset 0 0 0 2px rgba(253, 246, 230, 0.35);
    transform: rotate(4deg);
}

.hero-text {
    position: relative;
    z-index: 2;
    max-width: 820px;
    margin: 0 auto;
    text-align: center;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 0.95rem;
    letter-spacing: 0.18em;
    color: var(--gold-2);
    padding: 0.35rem 1.1rem;
    border: 1px solid rgba(184, 147, 78, 0.5);
    border-radius: 999px;
    margin-bottom: 1.6rem;
}

.hero h1 {
    font-size: 2.7rem;
    line-height: 1.35;
    margin-bottom: 1.2rem;
    color: #fdf6e6;
    text-shadow: 0 2px 18px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
    font-size: 1.1rem;
    margin-bottom: 2.2rem;
    color: rgba(247, 241, 226, 0.86);
    line-height: 1.95;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.cta-button {
    display: inline-block;
    padding: 0.9rem 2rem;
    font-size: 1.05rem;
    font-weight: 700;
    font-family: "Kaiti SC", "STKaiti", "KaiTi", serif;
    letter-spacing: 0.05em;
    text-decoration: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.22s ease;
}

.cta-primary {
    background: linear-gradient(180deg, var(--cinnabar), var(--cinnabar-2));
    color: #fdf6e6;
    border: 1px solid var(--gold);
    box-shadow: 0 6px 18px rgba(158, 43, 37, 0.42);
}

.cta-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 26px rgba(158, 43, 37, 0.5);
}

.cta-ghost {
    background: transparent;
    color: var(--paper);
    border: 1px solid rgba(217, 189, 126, 0.6);
}

.cta-ghost:hover {
    background: rgba(184, 147, 78, 0.12);
    border-color: var(--gold-2);
}

.cta-large {
    padding: 1.05rem 2.8rem;
    font-size: 1.15rem;
}

/* 装裱式画框 */
.hero-image {
    position: relative;
    z-index: 2;
    margin: 3rem auto 0;
    padding: 10px;
    background: rgba(253, 250, 240, 0.94);
    border: 1px solid var(--gold);
    border-radius: 8px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
}

.hero-image img {
    width: 100%;
    height: 380px;
    object-fit: cover;
    border-radius: 4px;
    display: block;
}

/* ============ 通用标题 ============ */
h2 {
    font-size: 2rem;
    color: var(--ink);
    margin-bottom: 1.6rem;
    position: relative;
    padding-left: 1.15rem;
}

h2::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.28em;
    bottom: 0.28em;
    width: 6px;
    border-radius: 3px;
    background: linear-gradient(180deg, var(--cinnabar), var(--gold));
}

/* ============ 痛点共鸣 ============ */
.intro {
    padding: 4.5rem 0;
    background: var(--paper-2);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.pain-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2.2rem;
}

.pain-item {
    position: relative;
    background: var(--card);
    padding: 1.8rem 1.6rem;
    border: 1px solid var(--line);
    border-radius: 6px;
    box-shadow: var(--shadow);
    transition: transform 0.22s, box-shadow 0.22s, border-color 0.22s;
}

.pain-item::before {
    content: "";
    position: absolute;
    top: -1px;
    left: -1px;
    width: 40px;
    height: 40px;
    border-top: 3px solid var(--cinnabar);
    border-left: 3px solid var(--cinnabar);
    border-radius: 6px 0 0 0;
}

.pain-item:hover {
    transform: translateY(-4px);
    border-color: var(--gold);
    box-shadow: 0 14px 34px rgba(70, 52, 20, 0.14);
}

.pain-item h4 {
    font-size: 1.2rem;
    color: var(--cinnabar);
    margin-bottom: 0.7rem;
}

.pain-item p {
    font-size: 0.96rem;
    color: var(--ink-soft);
    line-height: 1.85;
}

.intro-bridge {
    font-size: 1.12rem;
    color: var(--ink);
    text-align: center;
    max-width: 720px;
    margin: 0 auto;
    padding-top: 1.6rem;
    border-top: 1px solid var(--line);
}

/* ============ 功能区 ============ */
.features {
    padding: 4.5rem 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

.feature-card {
    background: var(--card);
    padding: 2rem;
    border: 1px solid var(--line);
    border-radius: 6px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--cinnabar);
    transition: transform 0.22s, box-shadow 0.22s, border-color 0.22s;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-left-color: var(--gold);
    box-shadow: 0 16px 38px rgba(70, 52, 20, 0.15);
}

.feature-card h3 {
    font-size: 1.32rem;
    color: var(--ink);
    margin-bottom: 0.4rem;
}

.feature-card h4 {
    font-size: 0.95rem;
    color: var(--gold);
    margin-bottom: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.06em;
}

.feature-card p {
    font-size: 0.96rem;
    color: var(--ink-soft);
    line-height: 1.9;
}

/* ============ 产品展示 ============ */
.showcase {
    padding: 4.5rem 0;
    background: linear-gradient(180deg, #eef1f8, #e5ebf5);
    border-top: 1px solid #d3dbea;
    border-bottom: 1px solid #d3dbea;
}

.showcase h2 {
    color: var(--blue);
}

.showcase h2::before {
    background: linear-gradient(180deg, var(--blue), var(--gold));
}

.section-desc {
    color: #566a8c;
    font-size: 1.05rem;
    margin-bottom: 2rem;
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.showcase-item {
    background: var(--card);
    border: 1px solid #d3dbea;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.22s, box-shadow 0.22s;
}

.showcase-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 38px rgba(43, 74, 125, 0.18);
}

.showcase-figure {
    padding: 8px;
    background: #f4f7fc;
    border-bottom: 1px solid #d3dbea;
}

.showcase-item img {
    width: 100%;
    height: 210px;
    object-fit: cover;
    border-radius: 4px;
    display: block;
}

.showcase-item h3 {
    font-size: 1.18rem;
    color: var(--blue);
    margin: 1.2rem 1.3rem 0.25rem;
}

.showcase-item h4 {
    font-size: 0.9rem;
    color: var(--gold);
    margin: 0 1.3rem 0.6rem;
    font-weight: 500;
    letter-spacing: 0.05em;
}

.showcase-item p {
    font-size: 0.92rem;
    color: var(--ink-soft);
    margin: 0 1.3rem 1.3rem;
    line-height: 1.85;
}

/* ============ 谁在用 ============ */
.scenes {
    padding: 4.5rem 0;
}

.scene-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

.scene-item {
    position: relative;
    padding: 2rem 1.8rem;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 6px;
    box-shadow: var(--shadow);
    transition: transform 0.22s, box-shadow 0.22s, border-color 0.22s;
}

.scene-item::after {
    content: "·";
    position: absolute;
    top: 1.2rem;
    right: 1.4rem;
    color: var(--gold);
    font-size: 2rem;
    line-height: 1;
}

.scene-item:hover {
    transform: translateY(-4px);
    border-color: var(--gold);
    box-shadow: 0 14px 34px rgba(70, 52, 20, 0.14);
}

.scene-item h3 {
    font-size: 1.25rem;
    color: var(--cinnabar);
    margin-bottom: 0.8rem;
}

.scene-item p {
    font-size: 0.95rem;
    color: var(--ink-soft);
    line-height: 1.9;
}

/* ============ 三步开始 ============ */
.start-section {
    padding: 4.5rem 0;
    background: var(--paper-2);
    border-top: 1px solid var(--line);
    text-align: center;
}

.start-section h2 {
    display: inline-block;
    padding-left: 0;
    padding-bottom: 0.7rem;
}

.start-section h2::before {
    left: 50%;
    top: auto;
    bottom: 0;
    width: 70px;
    height: 3px;
    transform: translateX(-50%);
    background: linear-gradient(90deg, transparent, var(--cinnabar), var(--gold), transparent);
    border-radius: 2px;
}

.steps {
    display: flex;
    gap: 2rem;
    margin: 2.8rem 0;
    justify-content: center;
}

.step {
    flex: 1;
    max-width: 300px;
    text-align: center;
}

.step-num {
    width: 58px;
    height: 58px;
    margin: 0 auto 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: "Kaiti SC", "STKaiti", "KaiTi", serif;
    font-size: 1.5rem;
    color: #fdf6e6;
    background: linear-gradient(160deg, var(--cinnabar), var(--cinnabar-2));
    border: 2px solid var(--gold-2);
    border-radius: 8px;
    box-shadow: 0 6px 16px rgba(158, 43, 37, 0.35);
}

.step h3 {
    font-size: 1.2rem;
    color: var(--ink);
    margin-bottom: 0.3rem;
}

.step h4 {
    font-size: 0.9rem;
    color: var(--gold);
    margin-bottom: 0.6rem;
    font-weight: 500;
}

.step p {
    font-size: 0.92rem;
    color: var(--ink-soft);
}

.start-cta {
    margin-top: 2rem;
}

.start-note {
    font-size: 0.88rem;
    color: #9a8d72;
    margin-top: 0.9rem;
}

/* ============ 底部总结 ============ */
.summary {
    position: relative;
    overflow: hidden;
    padding: 4.5rem 0;
    background: linear-gradient(160deg, #221f19 0%, #16150f 50%, #2a1d1a 100%);
    color: var(--paper);
    text-align: center;
}

.summary::before {
    content: "";
    position: absolute;
    top: -70px;
    left: 50%;
    transform: translateX(-50%);
    width: 320px;
    height: 320px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(184, 147, 78, 0.22), rgba(184, 147, 78, 0) 70%);
    pointer-events: none;
}

.summary .container {
    position: relative;
    z-index: 2;
}

.summary h2 {
    display: inline-block;
    padding-left: 0;
    padding-bottom: 0.7rem;
    color: #fdf6e6;
}

.summary h2::before {
    left: 50%;
    top: auto;
    bottom: 0;
    width: 70px;
    height: 3px;
    transform: translateX(-50%);
    background: linear-gradient(90deg, transparent, var(--cinnabar), var(--gold), transparent);
}

.summary p {
    color: rgba(247, 241, 226, 0.85);
    font-size: 1.05rem;
    max-width: 760px;
    margin: 1.6rem auto 2rem;
    line-height: 1.95;
}

/* ============ 页脚 ============ */
footer {
    background: #12110d;
    color: rgba(247, 241, 226, 0.55);
    text-align: center;
    padding: 1.6rem 0;
    border-top: 3px double var(--gold);
}

footer p {
    font-size: 0.88rem;
    letter-spacing: 0.05em;
}

/* ============ 响应式 ============ */
@media (max-width: 768px) {
    h2 {
        font-size: 1.6rem;
    }

    .hero {
        padding: 3.5rem 0 3rem;
    }

    .hero-seal {
        top: 1.6rem;
        right: 5%;
        width: 50px;
        height: 50px;
        font-size: 0.72rem;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-image img {
        height: 240px;
    }

    .pain-grid,
    .feature-grid,
    .showcase-grid,
    .scene-grid {
        grid-template-columns: 1fr;
    }

    .steps {
        flex-direction: column;
        align-items: center;
    }

    .menu-toggle {
        display: block;
        margin-left: auto;
    }

    header .container {
        position: relative;
    }

    nav ul {
        display: none;
        flex-direction: column;
        gap: 0;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--paper);
        padding: 0;
        box-shadow: 0 12px 30px rgba(70, 52, 20, 0.18);
        border-radius: 0 0 10px 10px;
        border-top: 1px solid var(--line);
        overflow: hidden;
    }

    nav ul.active {
        display: flex;
    }

    nav a {
        display: block;
        padding: 1rem 1.5rem;
        border-bottom: 1px solid var(--line);
        border-radius: 0;
        color: var(--ink-soft);
    }

    nav a::after {
        display: none;
    }

    nav .nav-register {
        margin: 0.8rem 1.2rem;
        text-align: center;
        border-bottom: none;
        color: #fdf6e6 !important;
    }

    nav li:last-child a {
        border-bottom: none;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.5rem;
    }

    .hero-eyebrow {
        font-size: 0.8rem;
        letter-spacing: 0.1em;
    }

    .site-title {
        font-size: 1.15rem;
    }

    .hero-image img {
        height: 200px;
    }

    .cta-button {
        width: 100%;
        text-align: center;
    }
}