/* 爱思助手专业版 - i4 Pro Style */
:root {
    --pro-blue: #0084FF;
    --pro-blue-dim: rgba(0, 132, 255, 0.1);
    --pro-text: #1D1D1F;
    --pro-sub: #66666B;
    --pro-bg: #FFF9F5; /* 胡萝卜暖色底色 */
    --pro-white: #FFFFFF;
    --pro-border: rgba(255, 127, 80, 0.1);
    --pro-green: #10B981;
    --font-main: 'Plus Jakarta Sans', 'Noto Sans SC', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-main);
    color: var(--pro-text);
    background-color: var(--pro-bg);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header Navigation */
.pro-nav {
    height: 80px;
    background: rgba(255, 249, 245, 0.8);
    backdrop-filter: blur(20px);
    position: fixed;
    top: 0; width: 100%;
    z-index: 1000;
    border-bottom: 1px solid var(--pro-border);
}

.nav-wrap {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.pro-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 800;
    color: var(--pro-text);
    letter-spacing: -0.5px;
}

.pro-logo span span {
    font-size: 10px;
    background: var(--pro-blue);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    vertical-align: middle;
    margin-left: 4px;
}

.logo-mark { width: 32px; height: 32px; }
.logo-mark.small { width: 24px; height: 24px; }

.nav-menu { display: flex; align-items: center; gap: 40px; }
.nav-menu a {
    text-decoration: none;
    color: var(--pro-text);
    font-size: 14px;
    font-weight: 600;
    transition: 0.2s;
}
.nav-menu a:hover { color: var(--pro-blue); }

.btn-pro-nav {
    background: var(--pro-text);
    color: white !important;
    padding: 10px 24px;
    border-radius: 50px;
}
.btn-pro-nav:hover { background: var(--pro-blue); transform: translateY(-2px); }

/* Hero Section */
.pro-hero {
    padding: 160px 0 100px;
    overflow: hidden;
    text-align: center;
}

.hero-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.hero-content { 
    max-width: 800px;
}
.pro-tag {
    font-size: 12px;
    font-weight: 800;
    color: var(--pro-blue);
    letter-spacing: 2px;
    margin-bottom: 24px;
}

.hero-h1 {
    font-size: 64px;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 32px;
    letter-spacing: -2px;
}

.hero-p {
    font-size: 18px;
    color: var(--pro-sub);
    margin-bottom: 48px;
    max-width: 520px;
}

.hero-btns {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
}

.btn-pro-main {
    text-decoration: none;
    background: var(--pro-blue);
    color: white;
    padding: 20px 48px;
    border-radius: 12px;
    font-size: 18px;
    font-weight: 700;
    transition: 0.3s;
    box-shadow: 0 10px 30px rgba(0, 132, 255, 0.2);
}
.btn-pro-main:hover { transform: translateY(-4px); box-shadow: 0 20px 40px rgba(0, 132, 255, 0.3); }

.ver-info { font-size: 13px; color: var(--pro-sub); font-weight: 500; }

/* Hero Visual Mockup */
.hero-visual { flex: 1.2; position: relative; }
.pro-window-mock {
    background: white;
    border-radius: 20px;
    box-shadow: 0 40px 100px rgba(0,0,0,0.08);
    border: 1px solid var(--pro-border);
    overflow: hidden;
    animation: floatWindow 6s infinite ease-in-out;
}

@keyframes floatWindow { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-15px); } }

.mock-header {
    height: 44px;
    background: #F9FAFB;
    display: flex;
    align-items: center;
    padding: 0 20px;
    border-bottom: 1px solid var(--pro-border);
}
.mock-dots { display: flex; gap: 8px; }
.mock-dots span { width: 10px; height: 10px; border-radius: 50%; background: #E5E7EB; }
.mock-title { flex: 1; text-align: center; font-size: 12px; color: #9CA3AF; font-weight: 600; }

.mock-body { height: 380px; display: flex; }
.mock-side { width: 140px; background: #F9FAFB; border-right: 1px solid var(--pro-border); }
.mock-main { flex: 1; padding: 40px; display: flex; align-items: center; gap: 40px; }
.mock-iphone { width: 110px; height: 220px; background: #F3F4F6; border-radius: 20px; border: 1px solid #E5E7EB; }
.mock-details { flex: 1; }
.m-line { height: 10px; background: #F3F4F6; margin-bottom: 16px; border-radius: 5px; }
.m-line.short { width: 60%; }

/* Features Grid */
.pro-features { padding: 100px 0; }
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.feature-item {
    padding: 48px 32px;
    background: white;
    border-radius: 24px;
    border: 1px solid var(--pro-border);
    transition: 0.3s;
}
.feature-item:hover { transform: translateY(-8px); border-color: var(--pro-blue); box-shadow: 0 20px 40px rgba(0,0,0,0.03); }

.fi-icon {
    width: 48px; height: 48px;
    background: var(--pro-blue-dim);
    color: var(--pro-blue);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}
.fi-icon svg { width: 24px; height: 24px; }
.feature-item h4 { font-size: 20px; font-weight: 800; margin-bottom: 12px; }
.feature-item p { font-size: 14px; color: var(--pro-sub); }

/* Report Section */
.pro-report { padding: 120px 0; background: #F2F2ED; }
.report-inner { display: flex; align-items: center; gap: 100px; }
.report-text { flex: 1.2; }
.sec-h2 { font-size: 40px; font-weight: 900; margin-bottom: 24px; line-height: 1.2; }
.sec-p { font-size: 18px; color: var(--pro-sub); margin-bottom: 48px; }

.report-stats-grid { display: flex; gap: 60px; }
.rs-item strong { display: block; font-size: 32px; color: var(--pro-text); }
.rs-item span { font-size: 13px; color: var(--pro-sub); font-weight: 600; text-transform: uppercase; }

.report-visual { flex: 0.8; display: flex; justify-content: center; }
.pro-report-card {
    width: 320px;
    background: white;
    padding: 40px;
    border-radius: 24px;
    box-shadow: 0 30px 60px rgba(0,0,0,0.05);
    position: relative;
}
.rc-header { font-size: 16px; font-weight: 800; text-align: center; margin-bottom: 32px; }
.rcl-item { display: flex; justify-content: space-between; padding: 14px 0; border-bottom: 1px dotted #E5E7EB; font-size: 14px; }
.rcl-item:last-child { border-bottom: none; }
.rcl-item strong.green { color: var(--pro-green); }

.rc-badge {
    position: absolute; top: -20px; right: -20px;
    width: 72px; height: 72px;
    background: var(--pro-green);
    color: white;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 28px; font-weight: 900;
    box-shadow: 0 10px 20px rgba(16, 185, 129, 0.3);
}

/* Footer */
.pro-footer { padding: 80px 0 40px; background: #FFF9F5; border-top: 1px solid var(--pro-border); }
.ft-inner { display: flex; justify-content: space-between; gap: 100px; margin-bottom: 60px; }
.ft-info { flex: 1.5; }
.ft-info p { margin-top: 24px; color: var(--pro-sub); font-size: 14px; line-height: 1.8; max-width: 360px; }
.ft-links { flex: 2; display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; }
.ft-col h4 { font-size: 14px; font-weight: 800; margin-bottom: 24px; text-transform: uppercase; }
.ft-col a { display: block; text-decoration: none; color: var(--pro-sub); font-size: 14px; margin-bottom: 12px; transition: 0.2s; }
.ft-col a:hover { color: var(--pro-blue); }

.ft-bottom { padding-top: 40px; border-top: 1px solid var(--pro-border); text-align: center; font-size: 12px; color: #9CA3AF; }

/* Responsive */
@media (max-width: 1024px) {
    .hero-inner, .report-inner, .ft-inner { flex-direction: column; text-align: center; }
    .hero-h1 { font-size: 48px; }
    .hero-btns, .report-stats-grid { justify-content: center; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .ft-info p { margin: 24px auto 0; }
}
@media (max-width: 640px) {
    .features-grid { grid-template-columns: 1fr; }
    .nav-menu { display: none; }
}