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2364 lines (2112 loc) · 63.7 KB
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<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="PaperLens — AI 驱动的科研工作台。43个数据源，液态玻璃界面，Zotero 集成，离线可用，数据不出电脑。">
<meta property="og:title" content="PaperLens — 校外写论文，不用 VPN 也能下 ScienceDirect">
<meta property="og:description" content="CARSI 认证直连 300+ 高校数据库，43 个数据源并发搜索，AI 帮你找最值得读的那篇。免费开源，数据不出本机。">
<meta property="og:type" content="website">
<meta property="og:site_name" content="PaperLens">
<meta property="og:locale" content="zh_CN">
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:title" content="PaperLens — 不用 VPN 也能下 ScienceDirect">
<meta name="twitter:description" content="CARSI 认证直连 300+ 高校数据库，43 个数据源并发搜索，免费开源。">
<title>PaperLens — 校外写论文，不用 VPN 也能下 ScienceDirect</title>
<style>
/* ========================================
CSS Variables & Theming
======================================== */
:root {
--primary: #007AFF;
--primary-hover: #0051D5;
--primary-light: rgba(0, 122, 255, 0.08);
--bg: #FFFFFF;
--surface: #F5F5F7;
--surface-elevated: #FFFFFF;
--text: #1D1D1F;
--text-secondary: #6E6E73;
--text-tertiary: #AEAEB2;
--success: #34C759;
--success-light: rgba(52, 199, 89, 0.08);
--warning: #FF9500;
--danger: #FF3B30;
--border: rgba(0, 0, 0, 0.06);
--shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
--shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
--shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
--shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.16);
--glass-bg: rgba(255, 255, 255, 0.72);
--glass-border: rgba(255, 255, 255, 0.18);
--glass-blur: saturate(180%) blur(20px);
--hero-gradient: linear-gradient(135deg, #0F0C29 0%, #1A1A3E 40%, #24243E 100%);
--hero-mesh: radial-gradient(ellipse at 20% 50%, rgba(88, 86, 214, 0.4) 0%, transparent 50%),
radial-gradient(ellipse at 80% 20%, rgba(0, 122, 255, 0.3) 0%, transparent 50%),
radial-gradient(ellipse at 50% 80%, rgba(175, 82, 222, 0.2) 0%, transparent 50%);
--cta-gradient: linear-gradient(135deg, #007AFF 0%, #5856D6 100%);
--cta-glow: 0 0 60px rgba(0, 122, 255, 0.3), 0 0 120px rgba(88, 86, 214, 0.15);
--card-bg: #FFFFFF;
--card-border: rgba(0, 0, 0, 0.06);
--section-alt: #F5F5F7;
--pain-bg: #FFF5F5;
--pain-border: #FFE0E0;
--solution-bg: #F0FFF4;
--solution-border: #C6F6D5;
--font: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text',
'Helvetica Neue', 'Microsoft YaHei', 'PingFang SC', 'Noto Sans SC',
sans-serif;
--font-mono: 'SF Mono', SFMono-Regular, Menlo, Consolas, monospace;
--max-width: 1200px;
--radius-sm: 8px;
--radius-md: 16px;
--radius-lg: 24px;
--radius-xl: 32px;
--transition-fast: 200ms cubic-bezier(0.25, 0.1, 0.25, 1);
--transition-normal: 400ms cubic-bezier(0.25, 0.1, 0.25, 1);
--transition-slow: 600ms cubic-bezier(0.25, 0.1, 0.25, 1);
}
@media (prefers-color-scheme: dark) {
:root {
--bg: #1C1C1E;
--surface: #2C2C2E;
--surface-elevated: #3A3A3C;
--text: #F5F5F7;
--text-secondary: #AEAEB2;
--text-tertiary: #636366;
--border: rgba(255, 255, 255, 0.08);
--shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
--shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
--shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
--shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.5);
--glass-bg: rgba(44, 44, 46, 0.72);
--glass-border: rgba(255, 255, 255, 0.1);
--card-bg: #2C2C2E;
--card-border: rgba(255, 255, 255, 0.06);
--section-alt: #2C2C2E;
--primary-light: rgba(0, 122, 255, 0.15);
--success-light: rgba(52, 199, 89, 0.15);
--pain-bg: rgba(255, 59, 48, 0.08);
--pain-border: rgba(255, 59, 48, 0.2);
--solution-bg: rgba(52, 199, 89, 0.08);
--solution-border: rgba(52, 199, 89, 0.2);
}
}
/* ========================================
Reset & Base
======================================== */
*, *::before, *::after {
margin: 0;
padding: 0;
box-sizing: border-box;
}
html {
scroll-behavior: smooth;
scroll-padding-top: 80px;
-webkit-text-size-adjust: 100%;
}
body {
font-family: var(--font);
font-size: 16px;
line-height: 1.6;
color: var(--text);
background-color: var(--bg);
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
overflow-x: hidden;
}
::selection {
background: rgba(0, 122, 255, 0.2);
color: var(--text);
}
a {
color: var(--primary);
text-decoration: none;
transition: color var(--transition-fast);
}
a:hover {
color: var(--primary-hover);
}
img {
max-width: 100%;
height: auto;
}
/* ========================================
Typography
======================================== */
h1, h2, h3, h4, h5, h6 {
font-weight: 700;
line-height: 1.15;
letter-spacing: -0.02em;
color: var(--text);
}
h1 { font-size: clamp(36px, 5vw, 56px); }
h2 { font-size: clamp(28px, 4vw, 40px); }
h3 { font-size: clamp(20px, 2.5vw, 28px); }
h4 { font-size: 20px; }
p {
color: var(--text-secondary);
line-height: 1.7;
}
/* ========================================
Layout Utilities
======================================== */
.container {
max-width: var(--max-width);
margin: 0 auto;
padding: 0 24px;
}
.section {
padding: 120px 0;
}
.section-alt {
background-color: var(--section-alt);
}
.section-dark {
background-color: #1C1C1E;
color: #F5F5F7;
}
.section-dark h2,
.section-dark h3,
.section-dark h4 {
color: #F5F5F7;
}
.section-dark p {
color: rgba(245, 245, 247, 0.7);
}
/* ========================================
Scroll Animation
======================================== */
.reveal {
opacity: 0;
transform: translateY(24px);
transition: opacity var(--transition-slow), transform var(--transition-slow);
}
.reveal.visible {
opacity: 1;
transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }
/* Hero entry animations */
.hero-title {
opacity: 0;
transform: translateY(30px);
animation: heroFadeIn 0.8s cubic-bezier(0.25, 0.1, 0.25, 1) 0.1s forwards;
}
.hero-subtitle {
opacity: 0;
transform: translateY(20px);
animation: heroFadeIn 0.7s cubic-bezier(0.25, 0.1, 0.25, 1) 0.3s forwards;
}
.hero-cta {
opacity: 0;
transform: translateY(16px);
animation: heroFadeIn 0.6s cubic-bezier(0.25, 0.1, 0.25, 1) 0.5s forwards;
}
.hero-visual {
opacity: 0;
transform: translateY(24px) scale(0.98);
animation: heroVisualIn 0.8s cubic-bezier(0.25, 0.1, 0.25, 1) 0.7s forwards;
}
.hero-trust {
opacity: 0;
animation: heroFadeIn 0.6s cubic-bezier(0.25, 0.1, 0.25, 1) 1s forwards;
}
@keyframes heroFadeIn {
to {
opacity: 1;
transform: translateY(0);
}
}
@keyframes heroVisualIn {
to {
opacity: 1;
transform: translateY(0) scale(1);
}
}
/* Counter animation */
@keyframes countUp {
from { opacity: 0; transform: translateY(12px); }
to { opacity: 1; transform: translateY(0); }
}
/* ========================================
Navigation
======================================== */
.nav {
position: fixed;
top: 0;
left: 0;
right: 0;
z-index: 1000;
height: 56px;
display: flex;
align-items: center;
backdrop-filter: var(--glass-blur);
-webkit-backdrop-filter: var(--glass-blur);
background: var(--glass-bg);
border-bottom: 0.5px solid var(--border);
transition: all var(--transition-normal);
}
.nav-inner {
max-width: var(--max-width);
margin: 0 auto;
padding: 0 24px;
width: 100%;
display: flex;
align-items: center;
justify-content: space-between;
}
.nav-logo {
font-size: 18px;
font-weight: 700;
letter-spacing: -0.02em;
color: var(--text);
display: flex;
align-items: center;
gap: 8px;
}
.nav-logo-icon {
width: 28px;
height: 28px;
background: var(--cta-gradient);
border-radius: 7px;
display: flex;
align-items: center;
justify-content: center;
color: white;
font-size: 14px;
font-weight: 800;
}
.nav-links {
display: flex;
align-items: center;
gap: 32px;
list-style: none;
}
.nav-links a {
font-size: 14px;
font-weight: 500;
color: var(--text-secondary);
transition: color var(--transition-fast);
}
.nav-links a:hover {
color: var(--text);
}
.nav-cta {
display: inline-flex;
align-items: center;
gap: 6px;
padding: 8px 18px;
background: var(--cta-gradient);
color: white !important;
border-radius: 20px;
font-size: 13px;
font-weight: 600;
transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.nav-cta:hover {
transform: scale(1.03);
box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}
.nav-mobile-toggle {
display: none;
background: none;
border: none;
color: var(--text);
font-size: 24px;
cursor: pointer;
padding: 4px;
}
@media (max-width: 768px) {
.nav-links {
display: none;
position: absolute;
top: 56px;
left: 0;
right: 0;
flex-direction: column;
background: var(--glass-bg);
backdrop-filter: var(--glass-blur);
-webkit-backdrop-filter: var(--glass-blur);
border-bottom: 0.5px solid var(--border);
padding: 16px 24px;
gap: 16px;
}
.nav-links.open {
display: flex;
}
.nav-mobile-toggle {
display: block;
}
}
/* ========================================
Hero Section
======================================== */
.hero {
position: relative;
min-height: 100vh;
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
background: var(--hero-gradient);
overflow: hidden;
padding: 120px 24px 80px;
}
.hero::before {
content: '';
position: absolute;
inset: 0;
background: var(--hero-mesh);
opacity: 0.8;
}
.hero-content {
position: relative;
z-index: 1;
text-align: center;
max-width: 820px;
}
.hero-badge {
display: inline-flex;
align-items: center;
gap: 8px;
padding: 6px 16px;
border-radius: 20px;
background: rgba(255, 255, 255, 0.1);
border: 1px solid rgba(255, 255, 255, 0.15);
color: rgba(255, 255, 255, 0.8);
font-size: 13px;
font-weight: 500;
margin-bottom: 28px;
backdrop-filter: blur(10px);
-webkit-backdrop-filter: blur(10px);
}
.hero-badge-dot {
width: 6px;
height: 6px;
border-radius: 50%;
background: var(--success);
animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
0%, 100% { opacity: 1; }
50% { opacity: 0.4; }
}
.hero h1 {
color: #FFFFFF;
font-size: clamp(38px, 6vw, 64px);
font-weight: 700;
letter-spacing: -0.03em;
line-height: 1.08;
margin-bottom: 24px;
}
.hero h1 .gradient-text {
background: linear-gradient(135deg, #60A5FA, #A78BFA, #F472B6);
-webkit-background-clip: text;
background-clip: text;
-webkit-text-fill-color: transparent;
}
.hero-subtitle {
font-size: clamp(17px, 2.5vw, 22px);
color: rgba(255, 255, 255, 0.65);
font-weight: 400;
line-height: 1.5;
max-width: 600px;
margin: 0 auto 40px;
}
.hero-cta-group {
display: flex;
gap: 16px;
justify-content: center;
flex-wrap: wrap;
margin-bottom: 48px;
}
.btn {
display: inline-flex;
align-items: center;
gap: 8px;
padding: 14px 32px;
border-radius: 14px;
font-size: 16px;
font-weight: 600;
font-family: var(--font);
cursor: pointer;
transition: all var(--transition-fast);
border: none;
text-decoration: none;
}
.btn:active {
transform: scale(0.97);
}
.btn-primary {
background: #FFFFFF;
color: #1C1C1E;
box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}
.btn-primary:hover {
transform: scale(1.02);
box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
color: #1C1C1E;
}
.btn-secondary {
background: rgba(255, 255, 255, 0.1);
color: #FFFFFF;
border: 1.5px solid rgba(255, 255, 255, 0.25);
backdrop-filter: blur(10px);
-webkit-backdrop-filter: blur(10px);
}
.btn-secondary:hover {
background: rgba(255, 255, 255, 0.18);
color: #FFFFFF;
transform: scale(1.02);
}
/* Hero Visual — Search Flow Comparison */
.hero-visual-wrapper {
position: relative;
z-index: 1;
max-width: 720px;
margin: 0 auto;
}
.search-compare {
display: grid;
grid-template-columns: 1fr auto 1fr;
gap: 16px;
align-items: center;
}
.compare-card {
background: rgba(255, 255, 255, 0.06);
border: 1px solid rgba(255, 255, 255, 0.1);
border-radius: var(--radius-md);
padding: 24px;
backdrop-filter: blur(12px);
-webkit-backdrop-filter: blur(12px);
}
.compare-card-label {
font-size: 12px;
font-weight: 600;
text-transform: uppercase;
letter-spacing: 0.08em;
color: rgba(255, 255, 255, 0.4);
margin-bottom: 16px;
}
.compare-old {
border-color: rgba(255, 255, 255, 0.06);
}
.flow-old {
display: flex;
flex-direction: column;
gap: 8px;
}
.flow-old-step {
display: flex;
align-items: center;
gap: 10px;
padding: 8px 12px;
background: rgba(255, 255, 255, 0.04);
border-radius: 8px;
font-size: 13px;
color: rgba(255, 255, 255, 0.45);
}
.flow-old-step-icon {
width: 24px;
height: 24px;
border-radius: 6px;
background: rgba(255, 255, 255, 0.06);
display: flex;
align-items: center;
justify-content: center;
font-size: 11px;
flex-shrink: 0;
color: rgba(255, 255, 255, 0.3);
}
.flow-old-step-arrow {
text-align: center;
color: rgba(255, 255, 255, 0.2);
font-size: 11px;
}
.compare-new {
border-color: rgba(0, 122, 255, 0.3);
background: rgba(0, 122, 255, 0.08);
}
.flow-new {
display: flex;
flex-direction: column;
gap: 12px;
align-items: center;
}
.flow-new-input {
width: 100%;
padding: 12px 16px;
background: rgba(255, 255, 255, 0.08);
border: 1px solid rgba(255, 255, 255, 0.12);
border-radius: 10px;
color: rgba(255, 255, 255, 0.8);
font-size: 14px;
text-align: left;
}
.flow-new-arrow {
font-size: 20px;
color: var(--primary);
}
.flow-new-sources {
display: flex;
gap: 6px;
flex-wrap: wrap;
justify-content: center;
}
.flow-new-source {
padding: 4px 10px;
background: rgba(0, 122, 255, 0.15);
border-radius: 6px;
font-size: 11px;
font-weight: 500;
color: rgba(0, 182, 255, 0.9);
}
.flow-new-result {
padding: 8px 16px;
background: var(--success);
border-radius: 8px;
font-size: 13px;
font-weight: 600;
color: #FFFFFF;
}
.compare-vs {
width: 40px;
height: 40px;
border-radius: 50%;
background: rgba(255, 255, 255, 0.1);
display: flex;
align-items: center;
justify-content: center;
font-size: 12px;
font-weight: 700;
color: rgba(255, 255, 255, 0.5);
flex-shrink: 0;
}
/* Hero Trust Bar */
.hero-trust-bar {
position: relative;
z-index: 1;
display: flex;
justify-content: center;
gap: 32px;
flex-wrap: wrap;
margin-top: 48px;
padding-top: 32px;
border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.hero-trust-item {
display: flex;
align-items: center;
gap: 8px;
font-size: 13px;
color: rgba(255, 255, 255, 0.45);
font-weight: 500;
}
.hero-trust-check {
color: var(--success);
font-size: 14px;
}
@media (max-width: 768px) {
.search-compare {
grid-template-columns: 1fr;
}
.compare-vs {
margin: 0 auto;
}
.hero {
padding: 100px 20px 60px;
min-height: auto;
}
.hero-cta-group {
flex-direction: column;
align-items: center;
}
.btn {
width: 100%;
max-width: 300px;
justify-content: center;
}
}
/* ========================================
Stats Bar
======================================== */
.stats-bar {
background: var(--bg);
border-bottom: 1px solid var(--border);
padding: 48px 24px;
}
.stats-grid {
max-width: var(--max-width);
margin: 0 auto;
display: grid;
grid-template-columns: repeat(4, 1fr);
gap: 32px;
text-align: center;
}
.stat-item {
display: flex;
flex-direction: column;
align-items: center;
gap: 4px;
}
.stat-number {
font-size: clamp(28px, 4vw, 40px);
font-weight: 700;
letter-spacing: -0.03em;
background: var(--cta-gradient);
-webkit-background-clip: text;
background-clip: text;
-webkit-text-fill-color: transparent;
line-height: 1.1;
}
.stat-label {
font-size: 14px;
color: var(--text-secondary);
font-weight: 500;
}
@media (max-width: 768px) {
.stats-grid {
grid-template-columns: repeat(2, 1fr);
gap: 24px;
}
}
/* ========================================
Section Header
======================================== */
.section-header {
text-align: center;
max-width: 680px;
margin: 0 auto 64px;
}
.section-header h2 {
margin-bottom: 16px;
}
.section-header p {
font-size: 18px;
color: var(--text-secondary);
line-height: 1.6;
}
.section-tag {
display: inline-block;
padding: 4px 14px;
border-radius: 8px;
font-size: 13px;
font-weight: 600;
margin-bottom: 16px;
}
.section-tag-blue {
background: var(--primary-light);
color: var(--primary);
}
.section-tag-green {
background: var(--success-light);
color: var(--success);
}
.section-tag-orange {
background: rgba(255, 149, 0, 0.1);
color: var(--warning);
}
/* ========================================
Three Pillars
======================================== */
.pillars-grid {
display: grid;
grid-template-columns: repeat(3, 1fr);
gap: 24px;
}
.pillar-card {
background: var(--card-bg);
border: 1px solid var(--card-border);
border-radius: var(--radius-lg);
padding: 40px 32px;
transition: transform var(--transition-fast), box-shadow var(--transition-fast);
position: relative;
overflow: hidden;
}
.pillar-card::before {
content: '';
position: absolute;
top: 0;
left: 0;
right: 0;
height: 3px;
background: var(--cta-gradient);
opacity: 0;
transition: opacity var(--transition-fast);
}
.pillar-card:hover {
transform: translateY(-4px);
box-shadow: var(--shadow-lg);
}
.pillar-card:hover::before {
opacity: 1;
}
.pillar-icon {
width: 56px;
height: 56px;
border-radius: 16px;
display: flex;
align-items: center;
justify-content: center;
font-size: 28px;
margin-bottom: 24px;
}
.pillar-icon-blue {
background: var(--primary-light);
color: var(--primary);
}
.pillar-icon-green {
background: var(--success-light);
color: var(--success);
}
.pillar-icon-purple {
background: rgba(88, 86, 214, 0.1);
color: #5856D6;
}
.pillar-card h3 {
font-size: 22px;
margin-bottom: 8px;
font-weight: 700;
}
.pillar-card .pillar-subtitle {
font-size: 15px;
color: var(--primary);
font-weight: 600;
margin-bottom: 16px;
}
.pillar-card p {
font-size: 15px;
line-height: 1.7;
color: var(--text-secondary);
}
.pillar-metric {
display: inline-block;
margin-top: 20px;
padding: 6px 14px;
background: var(--surface);
border-radius: 8px;
font-size: 13px;
font-weight: 600;
color: var(--text);
}
@media (max-width: 768px) {
.pillars-grid {
grid-template-columns: 1fr;
gap: 16px;
}
.pillar-card {
padding: 32px 24px;
}
}
/* ========================================
Pain-Solution Section
======================================== */
.pain-solution-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
max-width: 900px;
margin: 0 auto;
}
.pain-card, .solution-card {
border-radius: var(--radius-lg);
padding: 32px;
}
.pain-card {
background: var(--pain-bg);
border: 1px solid var(--pain-border);
}
.solution-card {
background: var(--solution-bg);
border: 1px solid var(--solution-border);
}
.pain-card h4, .solution-card h4 {
font-size: 14px;
font-weight: 600;
text-transform: uppercase;
letter-spacing: 0.06em;
margin-bottom: 16px;
}
.pain-card h4 {
color: var(--danger);
}
.solution-card h4 {
color: var(--success);
}
.pain-list, .solution-list {
list-style: none;
display: flex;
flex-direction: column;
gap: 12px;
}
.pain-list li, .solution-list li {
display: flex;
align-items: flex-start;
gap: 10px;
font-size: 15px;
line-height: 1.5;
color: var(--text);
}
.pain-list li::before {
content: '✕';
color: var(--danger);
font-weight: 700;
font-size: 13px;
flex-shrink: 0;
margin-top: 2px;
}
.solution-list li::before {
content: '✓';
color: var(--success);
font-weight: 700;
font-size: 13px;
flex-shrink: 0;
margin-top: 2px;
}
.pain-scenario {
margin-bottom: 40px;
}
.pain-scenario:last-child {
margin-bottom: 0;
}
.pain-scenario-title {
font-size: 20px;